• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "chrome/browser/metrics/metrics_log.h"
6 
7 #include <algorithm>
8 #include <string>
9 #include <vector>
10 
11 #include "base/base64.h"
12 #include "base/basictypes.h"
13 #include "base/bind.h"
14 #include "base/cpu.h"
15 #include "base/lazy_instance.h"
16 #include "base/memory/scoped_ptr.h"
17 #include "base/prefs/pref_registry_simple.h"
18 #include "base/prefs/pref_service.h"
19 #include "base/profiler/alternate_timer.h"
20 #include "base/sha1.h"
21 #include "base/strings/string_number_conversions.h"
22 #include "base/strings/string_util.h"
23 #include "base/strings/utf_string_conversions.h"
24 #include "base/sys_info.h"
25 #include "base/third_party/nspr/prtime.h"
26 #include "base/time/time.h"
27 #include "base/tracked_objects.h"
28 #include "chrome/browser/autocomplete/autocomplete_input.h"
29 #include "chrome/browser/autocomplete/autocomplete_match.h"
30 #include "chrome/browser/autocomplete/autocomplete_provider.h"
31 #include "chrome/browser/autocomplete/autocomplete_result.h"
32 #include "chrome/browser/browser_process.h"
33 #include "chrome/browser/google/google_util.h"
34 #include "chrome/browser/omnibox/omnibox_log.h"
35 #include "chrome/browser/plugins/plugin_prefs.h"
36 #include "chrome/browser/profiles/profile_manager.h"
37 #include "chrome/common/chrome_version_info.h"
38 #include "chrome/common/logging_chrome.h"
39 #include "chrome/common/metrics/proto/omnibox_event.pb.h"
40 #include "chrome/common/metrics/proto/profiler_event.pb.h"
41 #include "chrome/common/metrics/proto/system_profile.pb.h"
42 #include "chrome/common/metrics/variations/variations_util.h"
43 #include "chrome/common/pref_names.h"
44 #include "chrome/installer/util/google_update_settings.h"
45 #include "components/nacl/common/nacl_process_type.h"
46 #include "content/public/browser/gpu_data_manager.h"
47 #include "content/public/common/content_client.h"
48 #include "content/public/common/webplugininfo.h"
49 #include "device/bluetooth/bluetooth_adapter.h"
50 #include "device/bluetooth/bluetooth_adapter_factory.h"
51 #include "device/bluetooth/bluetooth_device.h"
52 #include "gpu/config/gpu_info.h"
53 #include "ui/gfx/screen.h"
54 #include "url/gurl.h"
55 
56 #if defined(OS_ANDROID)
57 #include "base/android/build_info.h"
58 #endif
59 
60 #if defined(OS_WIN)
61 #include "base/win/metro.h"
62 
63 // http://blogs.msdn.com/oldnewthing/archive/2004/10/25/247180.aspx
64 extern "C" IMAGE_DOS_HEADER __ImageBase;
65 #endif
66 
67 #if defined(OS_CHROMEOS)
68 #include "chrome/browser/chromeos/login/user_manager.h"
69 #endif
70 
71 using content::GpuDataManager;
72 using metrics::OmniboxEventProto;
73 using metrics::PerfDataProto;
74 using metrics::ProfilerEventProto;
75 using metrics::SystemProfileProto;
76 using tracked_objects::ProcessDataSnapshot;
77 typedef chrome_variations::ActiveGroupId ActiveGroupId;
78 typedef SystemProfileProto::GoogleUpdate::ProductInfo ProductInfo;
79 typedef SystemProfileProto::Hardware::Bluetooth::PairedDevice PairedDevice;
80 
81 namespace {
82 
83 // Returns the date at which the current metrics client ID was created as
84 // a string containing seconds since the epoch, or "0" if none was found.
GetMetricsEnabledDate(PrefService * pref)85 std::string GetMetricsEnabledDate(PrefService* pref) {
86   if (!pref) {
87     NOTREACHED();
88     return "0";
89   }
90 
91   return pref->GetString(prefs::kMetricsClientIDTimestamp);
92 }
93 
AsOmniboxEventInputType(AutocompleteInput::Type type)94 OmniboxEventProto::InputType AsOmniboxEventInputType(
95     AutocompleteInput::Type type) {
96   switch (type) {
97     case AutocompleteInput::INVALID:
98       return OmniboxEventProto::INVALID;
99     case AutocompleteInput::UNKNOWN:
100       return OmniboxEventProto::UNKNOWN;
101     case AutocompleteInput::URL:
102       return OmniboxEventProto::URL;
103     case AutocompleteInput::QUERY:
104       return OmniboxEventProto::QUERY;
105     case AutocompleteInput::FORCED_QUERY:
106       return OmniboxEventProto::FORCED_QUERY;
107     default:
108       NOTREACHED();
109       return OmniboxEventProto::INVALID;
110   }
111 }
112 
AsOmniboxEventResultType(AutocompleteMatch::Type type)113 OmniboxEventProto::Suggestion::ResultType AsOmniboxEventResultType(
114     AutocompleteMatch::Type type) {
115   switch (type) {
116     case AutocompleteMatchType::URL_WHAT_YOU_TYPED:
117       return OmniboxEventProto::Suggestion::URL_WHAT_YOU_TYPED;
118     case AutocompleteMatchType::HISTORY_URL:
119       return OmniboxEventProto::Suggestion::HISTORY_URL;
120     case AutocompleteMatchType::HISTORY_TITLE:
121       return OmniboxEventProto::Suggestion::HISTORY_TITLE;
122     case AutocompleteMatchType::HISTORY_BODY:
123       return OmniboxEventProto::Suggestion::HISTORY_BODY;
124     case AutocompleteMatchType::HISTORY_KEYWORD:
125       return OmniboxEventProto::Suggestion::HISTORY_KEYWORD;
126     case AutocompleteMatchType::NAVSUGGEST:
127       return OmniboxEventProto::Suggestion::NAVSUGGEST;
128     case AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED:
129       return OmniboxEventProto::Suggestion::SEARCH_WHAT_YOU_TYPED;
130     case AutocompleteMatchType::SEARCH_HISTORY:
131       return OmniboxEventProto::Suggestion::SEARCH_HISTORY;
132     case AutocompleteMatchType::SEARCH_SUGGEST:
133       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST;
134     case AutocompleteMatchType::SEARCH_SUGGEST_ENTITY:
135       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST_ENTITY;
136     case AutocompleteMatchType::SEARCH_SUGGEST_INFINITE:
137       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST_INFINITE;
138     case AutocompleteMatchType::SEARCH_SUGGEST_PERSONALIZED:
139       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST_PERSONALIZED;
140     case AutocompleteMatchType::SEARCH_SUGGEST_PROFILE:
141       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST_PROFILE;
142     case AutocompleteMatchType::SEARCH_OTHER_ENGINE:
143       return OmniboxEventProto::Suggestion::SEARCH_OTHER_ENGINE;
144     case AutocompleteMatchType::EXTENSION_APP:
145       return OmniboxEventProto::Suggestion::EXTENSION_APP;
146     case AutocompleteMatchType::CONTACT:
147       return OmniboxEventProto::Suggestion::CONTACT;
148     case AutocompleteMatchType::BOOKMARK_TITLE:
149       return OmniboxEventProto::Suggestion::BOOKMARK_TITLE;
150     default:
151       NOTREACHED();
152       return OmniboxEventProto::Suggestion::UNKNOWN_RESULT_TYPE;
153   }
154 }
155 
AsOmniboxEventPageClassification(AutocompleteInput::PageClassification page_classification)156 OmniboxEventProto::PageClassification AsOmniboxEventPageClassification(
157     AutocompleteInput::PageClassification page_classification) {
158   switch (page_classification) {
159     case AutocompleteInput::INVALID_SPEC:
160       return OmniboxEventProto::INVALID_SPEC;
161     case AutocompleteInput::NTP:
162       return OmniboxEventProto::NTP;
163     case AutocompleteInput::BLANK:
164       return OmniboxEventProto::BLANK;
165     case AutocompleteInput::HOME_PAGE:
166       return OmniboxEventProto::HOME_PAGE;
167     case AutocompleteInput::OTHER:
168       return OmniboxEventProto::OTHER;
169     case AutocompleteInput::SEARCH_RESULT_PAGE_DOING_SEARCH_TERM_REPLACEMENT:
170       return OmniboxEventProto::
171           SEARCH_RESULT_PAGE_DOING_SEARCH_TERM_REPLACEMENT;
172     case AutocompleteInput::INSTANT_NTP_WITH_OMNIBOX_AS_STARTING_FOCUS:
173       return OmniboxEventProto::INSTANT_NTP_WITH_OMNIBOX_AS_STARTING_FOCUS;
174     case AutocompleteInput::INSTANT_NTP_WITH_FAKEBOX_AS_STARTING_FOCUS:
175       return OmniboxEventProto::INSTANT_NTP_WITH_FAKEBOX_AS_STARTING_FOCUS;
176     case AutocompleteInput::SEARCH_RESULT_PAGE_NO_SEARCH_TERM_REPLACEMENT:
177       return OmniboxEventProto::
178           SEARCH_RESULT_PAGE_NO_SEARCH_TERM_REPLACEMENT;
179   }
180   return OmniboxEventProto::INVALID_SPEC;
181 }
182 
AsProtobufProcessType(int process_type)183 ProfilerEventProto::TrackedObject::ProcessType AsProtobufProcessType(
184     int process_type) {
185   switch (process_type) {
186     case content::PROCESS_TYPE_BROWSER:
187       return ProfilerEventProto::TrackedObject::BROWSER;
188     case content::PROCESS_TYPE_RENDERER:
189       return ProfilerEventProto::TrackedObject::RENDERER;
190     case content::PROCESS_TYPE_PLUGIN:
191       return ProfilerEventProto::TrackedObject::PLUGIN;
192     case content::PROCESS_TYPE_WORKER:
193       return ProfilerEventProto::TrackedObject::WORKER;
194     case content::PROCESS_TYPE_UTILITY:
195       return ProfilerEventProto::TrackedObject::UTILITY;
196     case content::PROCESS_TYPE_ZYGOTE:
197       return ProfilerEventProto::TrackedObject::ZYGOTE;
198     case content::PROCESS_TYPE_SANDBOX_HELPER:
199       return ProfilerEventProto::TrackedObject::SANDBOX_HELPER;
200     case content::PROCESS_TYPE_GPU:
201       return ProfilerEventProto::TrackedObject::GPU;
202     case content::PROCESS_TYPE_PPAPI_PLUGIN:
203       return ProfilerEventProto::TrackedObject::PPAPI_PLUGIN;
204     case content::PROCESS_TYPE_PPAPI_BROKER:
205       return ProfilerEventProto::TrackedObject::PPAPI_BROKER;
206     case PROCESS_TYPE_NACL_LOADER:
207       return ProfilerEventProto::TrackedObject::NACL_LOADER;
208     case PROCESS_TYPE_NACL_BROKER:
209       return ProfilerEventProto::TrackedObject::NACL_BROKER;
210     default:
211       NOTREACHED();
212       return ProfilerEventProto::TrackedObject::UNKNOWN;
213   }
214 }
215 
216 // Computes a SHA-1 hash of |data| and returns it as a hex string.
ComputeSHA1(const std::string & data)217 std::string ComputeSHA1(const std::string& data) {
218   const std::string sha1 = base::SHA1HashString(data);
219   return base::HexEncode(sha1.data(), sha1.size());
220 }
221 
222 #if defined(ENABLE_PLUGINS)
223 // Returns the plugin preferences corresponding for this user, if available.
224 // If multiple user profiles are loaded, returns the preferences corresponding
225 // to an arbitrary one of the profiles.
GetPluginPrefs()226 PluginPrefs* GetPluginPrefs() {
227   ProfileManager* profile_manager = g_browser_process->profile_manager();
228 
229   if (!profile_manager) {
230     // The profile manager can be NULL when testing.
231     return NULL;
232   }
233 
234   std::vector<Profile*> profiles = profile_manager->GetLoadedProfiles();
235   if (profiles.empty())
236     return NULL;
237 
238   return PluginPrefs::GetForProfile(profiles.front()).get();
239 }
240 
241 // Fills |plugin| with the info contained in |plugin_info| and |plugin_prefs|.
SetPluginInfo(const content::WebPluginInfo & plugin_info,const PluginPrefs * plugin_prefs,SystemProfileProto::Plugin * plugin)242 void SetPluginInfo(const content::WebPluginInfo& plugin_info,
243                    const PluginPrefs* plugin_prefs,
244                    SystemProfileProto::Plugin* plugin) {
245   plugin->set_name(UTF16ToUTF8(plugin_info.name));
246   plugin->set_filename(plugin_info.path.BaseName().AsUTF8Unsafe());
247   plugin->set_version(UTF16ToUTF8(plugin_info.version));
248   plugin->set_is_pepper(plugin_info.is_pepper_plugin());
249   if (plugin_prefs)
250     plugin->set_is_disabled(!plugin_prefs->IsPluginEnabled(plugin_info));
251 }
252 #endif  // defined(ENABLE_PLUGINS)
253 
WriteFieldTrials(const std::vector<ActiveGroupId> & field_trial_ids,SystemProfileProto * system_profile)254 void WriteFieldTrials(const std::vector<ActiveGroupId>& field_trial_ids,
255                       SystemProfileProto* system_profile) {
256   for (std::vector<ActiveGroupId>::const_iterator it =
257        field_trial_ids.begin(); it != field_trial_ids.end(); ++it) {
258     SystemProfileProto::FieldTrial* field_trial =
259         system_profile->add_field_trial();
260     field_trial->set_name_id(it->name);
261     field_trial->set_group_id(it->group);
262   }
263 }
264 
WriteProfilerData(const ProcessDataSnapshot & profiler_data,int process_type,ProfilerEventProto * performance_profile)265 void WriteProfilerData(const ProcessDataSnapshot& profiler_data,
266                        int process_type,
267                        ProfilerEventProto* performance_profile) {
268   for (std::vector<tracked_objects::TaskSnapshot>::const_iterator it =
269            profiler_data.tasks.begin();
270        it != profiler_data.tasks.end(); ++it) {
271     const tracked_objects::DeathDataSnapshot& death_data = it->death_data;
272     ProfilerEventProto::TrackedObject* tracked_object =
273         performance_profile->add_tracked_object();
274     tracked_object->set_birth_thread_name_hash(
275         MetricsLogBase::Hash(it->birth.thread_name));
276     tracked_object->set_exec_thread_name_hash(
277         MetricsLogBase::Hash(it->death_thread_name));
278     tracked_object->set_source_file_name_hash(
279         MetricsLogBase::Hash(it->birth.location.file_name));
280     tracked_object->set_source_function_name_hash(
281         MetricsLogBase::Hash(it->birth.location.function_name));
282     tracked_object->set_source_line_number(it->birth.location.line_number);
283     tracked_object->set_exec_count(death_data.count);
284     tracked_object->set_exec_time_total(death_data.run_duration_sum);
285     tracked_object->set_exec_time_sampled(death_data.run_duration_sample);
286     tracked_object->set_queue_time_total(death_data.queue_duration_sum);
287     tracked_object->set_queue_time_sampled(death_data.queue_duration_sample);
288     tracked_object->set_process_type(AsProtobufProcessType(process_type));
289     tracked_object->set_process_id(profiler_data.process_id);
290   }
291 }
292 
293 #if defined(GOOGLE_CHROME_BUILD) && defined(OS_WIN)
ProductDataToProto(const GoogleUpdateSettings::ProductData & product_data,ProductInfo * product_info)294 void ProductDataToProto(const GoogleUpdateSettings::ProductData& product_data,
295                         ProductInfo* product_info) {
296   product_info->set_version(product_data.version);
297   product_info->set_last_update_success_timestamp(
298       product_data.last_success.ToTimeT());
299   product_info->set_last_error(product_data.last_error_code);
300   product_info->set_last_extra_error(product_data.last_extra_code);
301   if (ProductInfo::InstallResult_IsValid(product_data.last_result)) {
302     product_info->set_last_result(
303         static_cast<ProductInfo::InstallResult>(product_data.last_result));
304   }
305 }
306 #endif
307 
308 #if defined(OS_WIN)
309 struct ScreenDPIInformation {
310   double max_dpi_x;
311   double max_dpi_y;
312 };
313 
314 // Called once for each connected monitor.
GetMonitorDPICallback(HMONITOR,HDC hdc,LPRECT,LPARAM dwData)315 BOOL CALLBACK GetMonitorDPICallback(HMONITOR, HDC hdc, LPRECT, LPARAM dwData) {
316   const double kMillimetersPerInch = 25.4;
317   ScreenDPIInformation* screen_info =
318       reinterpret_cast<ScreenDPIInformation*>(dwData);
319   // Size of screen, in mm.
320   DWORD size_x = GetDeviceCaps(hdc, HORZSIZE);
321   DWORD size_y = GetDeviceCaps(hdc, VERTSIZE);
322   double dpi_x = (size_x > 0) ?
323       GetDeviceCaps(hdc, HORZRES) / (size_x / kMillimetersPerInch) : 0;
324   double dpi_y = (size_y > 0) ?
325       GetDeviceCaps(hdc, VERTRES) / (size_y / kMillimetersPerInch) : 0;
326   screen_info->max_dpi_x = std::max(dpi_x, screen_info->max_dpi_x);
327   screen_info->max_dpi_y = std::max(dpi_y, screen_info->max_dpi_y);
328   return TRUE;
329 }
330 
WriteScreenDPIInformationProto(SystemProfileProto::Hardware * hardware)331 void WriteScreenDPIInformationProto(SystemProfileProto::Hardware* hardware) {
332   HDC desktop_dc = GetDC(NULL);
333   if (desktop_dc) {
334     ScreenDPIInformation si = {0, 0};
335     if (EnumDisplayMonitors(desktop_dc, NULL, GetMonitorDPICallback,
336             reinterpret_cast<LPARAM>(&si))) {
337       hardware->set_max_dpi_x(si.max_dpi_x);
338       hardware->set_max_dpi_y(si.max_dpi_y);
339     }
340     ReleaseDC(GetDesktopWindow(), desktop_dc);
341   }
342 }
343 
344 #endif  // defined(OS_WIN)
345 
346 #if defined(OS_CHROMEOS)
AsBluetoothDeviceType(enum device::BluetoothDevice::DeviceType device_type)347 PairedDevice::Type AsBluetoothDeviceType(
348     enum device::BluetoothDevice::DeviceType device_type) {
349   switch (device_type) {
350     case device::BluetoothDevice::DEVICE_UNKNOWN:
351       return PairedDevice::DEVICE_UNKNOWN;
352     case device::BluetoothDevice::DEVICE_COMPUTER:
353       return PairedDevice::DEVICE_COMPUTER;
354     case device::BluetoothDevice::DEVICE_PHONE:
355       return PairedDevice::DEVICE_PHONE;
356     case device::BluetoothDevice::DEVICE_MODEM:
357       return PairedDevice::DEVICE_MODEM;
358     case device::BluetoothDevice::DEVICE_AUDIO:
359       return PairedDevice::DEVICE_AUDIO;
360     case device::BluetoothDevice::DEVICE_CAR_AUDIO:
361       return PairedDevice::DEVICE_CAR_AUDIO;
362     case device::BluetoothDevice::DEVICE_VIDEO:
363       return PairedDevice::DEVICE_VIDEO;
364     case device::BluetoothDevice::DEVICE_PERIPHERAL:
365       return PairedDevice::DEVICE_PERIPHERAL;
366     case device::BluetoothDevice::DEVICE_JOYSTICK:
367       return PairedDevice::DEVICE_JOYSTICK;
368     case device::BluetoothDevice::DEVICE_GAMEPAD:
369       return PairedDevice::DEVICE_GAMEPAD;
370     case device::BluetoothDevice::DEVICE_KEYBOARD:
371       return PairedDevice::DEVICE_KEYBOARD;
372     case device::BluetoothDevice::DEVICE_MOUSE:
373       return PairedDevice::DEVICE_MOUSE;
374     case device::BluetoothDevice::DEVICE_TABLET:
375       return PairedDevice::DEVICE_TABLET;
376     case device::BluetoothDevice::DEVICE_KEYBOARD_MOUSE_COMBO:
377       return PairedDevice::DEVICE_KEYBOARD_MOUSE_COMBO;
378   }
379 
380   NOTREACHED();
381   return PairedDevice::DEVICE_UNKNOWN;
382 }
383 #endif  // defined(OS_CHROMEOS)
384 
385 // Round a timestamp measured in seconds since epoch to one with a granularity
386 // of an hour. This can be used before uploaded potentially sensitive
387 // timestamps.
RoundSecondsToHour(int64 time_in_seconds)388 int64 RoundSecondsToHour(int64 time_in_seconds) {
389   return 3600 * (time_in_seconds / 3600);
390 }
391 
392 }  // namespace
393 
GoogleUpdateMetrics()394 GoogleUpdateMetrics::GoogleUpdateMetrics() : is_system_install(false) {}
395 
~GoogleUpdateMetrics()396 GoogleUpdateMetrics::~GoogleUpdateMetrics() {}
397 
398 static base::LazyInstance<std::string>::Leaky
399     g_version_extension = LAZY_INSTANCE_INITIALIZER;
400 
MetricsLog(const std::string & client_id,int session_id)401 MetricsLog::MetricsLog(const std::string& client_id, int session_id)
402     : MetricsLogBase(client_id, session_id, MetricsLog::GetVersionString()),
403       creation_time_(base::TimeTicks::Now()) {
404 #if defined(OS_CHROMEOS)
405   UpdateMultiProfileUserCount();
406 #endif
407 }
408 
~MetricsLog()409 MetricsLog::~MetricsLog() {}
410 
411 // static
RegisterPrefs(PrefRegistrySimple * registry)412 void MetricsLog::RegisterPrefs(PrefRegistrySimple* registry) {
413   registry->RegisterListPref(prefs::kStabilityPluginStats);
414 }
415 
416 // static
GetVersionString()417 std::string MetricsLog::GetVersionString() {
418   chrome::VersionInfo version_info;
419   if (!version_info.is_valid()) {
420     NOTREACHED() << "Unable to retrieve version info.";
421     return std::string();
422   }
423 
424   std::string version = version_info.Version();
425   if (!version_extension().empty())
426     version += version_extension();
427   if (!version_info.IsOfficialBuild())
428     version.append("-devel");
429   return version;
430 }
431 
432 // static
set_version_extension(const std::string & extension)433 void MetricsLog::set_version_extension(const std::string& extension) {
434   g_version_extension.Get() = extension;
435 }
436 
437 // static
version_extension()438 const std::string& MetricsLog::version_extension() {
439   return g_version_extension.Get();
440 }
441 
RecordStabilityMetrics(base::TimeDelta incremental_uptime,LogType log_type)442 void MetricsLog::RecordStabilityMetrics(
443     base::TimeDelta incremental_uptime,
444     LogType log_type) {
445   DCHECK_NE(NO_LOG, log_type);
446   DCHECK(!locked());
447   DCHECK(HasEnvironment());
448   DCHECK(!HasStabilityMetrics());
449 
450   PrefService* pref = GetPrefService();
451   DCHECK(pref);
452 
453   // Get stability attributes out of Local State, zeroing out stored values.
454   // NOTE: This could lead to some data loss if this report isn't successfully
455   //       sent, but that's true for all the metrics.
456 
457   WriteRequiredStabilityAttributes(pref);
458   WritePluginStabilityElements(pref);
459 
460   // Record recent delta for critical stability metrics.  We can't wait for a
461   // restart to gather these, as that delay biases our observation away from
462   // users that run happily for a looooong time.  We send increments with each
463   // uma log upload, just as we send histogram data.
464   WriteRealtimeStabilityAttributes(pref, incremental_uptime);
465 
466   // Omit some stats unless this is the initial stability log.
467   if (log_type != INITIAL_LOG)
468     return;
469 
470   int incomplete_shutdown_count =
471       pref->GetInteger(prefs::kStabilityIncompleteSessionEndCount);
472   pref->SetInteger(prefs::kStabilityIncompleteSessionEndCount, 0);
473   int breakpad_registration_success_count =
474       pref->GetInteger(prefs::kStabilityBreakpadRegistrationSuccess);
475   pref->SetInteger(prefs::kStabilityBreakpadRegistrationSuccess, 0);
476   int breakpad_registration_failure_count =
477       pref->GetInteger(prefs::kStabilityBreakpadRegistrationFail);
478   pref->SetInteger(prefs::kStabilityBreakpadRegistrationFail, 0);
479   int debugger_present_count =
480       pref->GetInteger(prefs::kStabilityDebuggerPresent);
481   pref->SetInteger(prefs::kStabilityDebuggerPresent, 0);
482   int debugger_not_present_count =
483       pref->GetInteger(prefs::kStabilityDebuggerNotPresent);
484   pref->SetInteger(prefs::kStabilityDebuggerNotPresent, 0);
485 
486   // TODO(jar): The following are all optional, so we *could* optimize them for
487   // values of zero (and not include them).
488   SystemProfileProto::Stability* stability =
489       uma_proto()->mutable_system_profile()->mutable_stability();
490   stability->set_incomplete_shutdown_count(incomplete_shutdown_count);
491   stability->set_breakpad_registration_success_count(
492       breakpad_registration_success_count);
493   stability->set_breakpad_registration_failure_count(
494       breakpad_registration_failure_count);
495   stability->set_debugger_present_count(debugger_present_count);
496   stability->set_debugger_not_present_count(debugger_not_present_count);
497 }
498 
GetPrefService()499 PrefService* MetricsLog::GetPrefService() {
500   return g_browser_process->local_state();
501 }
502 
GetScreenSize() const503 gfx::Size MetricsLog::GetScreenSize() const {
504   return gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().GetSizeInPixel();
505 }
506 
GetScreenDeviceScaleFactor() const507 float MetricsLog::GetScreenDeviceScaleFactor() const {
508   return gfx::Screen::GetNativeScreen()->
509       GetPrimaryDisplay().device_scale_factor();
510 }
511 
GetScreenCount() const512 int MetricsLog::GetScreenCount() const {
513   // TODO(scottmg): NativeScreen maybe wrong. http://crbug.com/133312
514   return gfx::Screen::GetNativeScreen()->GetNumDisplays();
515 }
516 
GetFieldTrialIds(std::vector<ActiveGroupId> * field_trial_ids) const517 void MetricsLog::GetFieldTrialIds(
518     std::vector<ActiveGroupId>* field_trial_ids) const {
519   chrome_variations::GetFieldTrialActiveGroupIds(field_trial_ids);
520 }
521 
HasEnvironment() const522 bool MetricsLog::HasEnvironment() const {
523   return uma_proto()->system_profile().has_uma_enabled_date();
524 }
525 
HasStabilityMetrics() const526 bool MetricsLog::HasStabilityMetrics() const {
527   return uma_proto()->system_profile().stability().has_launch_count();
528 }
529 
WritePluginStabilityElements(PrefService * pref)530 void MetricsLog::WritePluginStabilityElements(PrefService* pref) {
531   // Now log plugin stability info.
532   const ListValue* plugin_stats_list = pref->GetList(
533       prefs::kStabilityPluginStats);
534   if (!plugin_stats_list)
535     return;
536 
537 #if defined(ENABLE_PLUGINS)
538   SystemProfileProto::Stability* stability =
539       uma_proto()->mutable_system_profile()->mutable_stability();
540   for (ListValue::const_iterator iter = plugin_stats_list->begin();
541        iter != plugin_stats_list->end(); ++iter) {
542     if (!(*iter)->IsType(Value::TYPE_DICTIONARY)) {
543       NOTREACHED();
544       continue;
545     }
546     DictionaryValue* plugin_dict = static_cast<DictionaryValue*>(*iter);
547 
548     // Note that this search is potentially a quadratic operation, but given the
549     // low number of plugins installed on a "reasonable" setup, this should be
550     // fine.
551     // TODO(isherman): Verify that this does not show up as a hotspot in
552     // profiler runs.
553     const SystemProfileProto::Plugin* system_profile_plugin = NULL;
554     std::string plugin_name;
555     plugin_dict->GetString(prefs::kStabilityPluginName, &plugin_name);
556     const SystemProfileProto& system_profile = uma_proto()->system_profile();
557     for (int i = 0; i < system_profile.plugin_size(); ++i) {
558       if (system_profile.plugin(i).name() == plugin_name) {
559         system_profile_plugin = &system_profile.plugin(i);
560         break;
561       }
562     }
563 
564     if (!system_profile_plugin) {
565       NOTREACHED();
566       continue;
567     }
568 
569     SystemProfileProto::Stability::PluginStability* plugin_stability =
570         stability->add_plugin_stability();
571     *plugin_stability->mutable_plugin() = *system_profile_plugin;
572 
573     int launches = 0;
574     plugin_dict->GetInteger(prefs::kStabilityPluginLaunches, &launches);
575     if (launches > 0)
576       plugin_stability->set_launch_count(launches);
577 
578     int instances = 0;
579     plugin_dict->GetInteger(prefs::kStabilityPluginInstances, &instances);
580     if (instances > 0)
581       plugin_stability->set_instance_count(instances);
582 
583     int crashes = 0;
584     plugin_dict->GetInteger(prefs::kStabilityPluginCrashes, &crashes);
585     if (crashes > 0)
586       plugin_stability->set_crash_count(crashes);
587 
588     int loading_errors = 0;
589     plugin_dict->GetInteger(prefs::kStabilityPluginLoadingErrors,
590                             &loading_errors);
591     if (loading_errors > 0)
592       plugin_stability->set_loading_error_count(loading_errors);
593   }
594 #endif  // defined(ENABLE_PLUGINS)
595 
596   pref->ClearPref(prefs::kStabilityPluginStats);
597 }
598 
599 // The server refuses data that doesn't have certain values.  crashcount and
600 // launchcount are currently "required" in the "stability" group.
601 // TODO(isherman): Stop writing these attributes specially once the migration to
602 // protobufs is complete.
WriteRequiredStabilityAttributes(PrefService * pref)603 void MetricsLog::WriteRequiredStabilityAttributes(PrefService* pref) {
604   int launch_count = pref->GetInteger(prefs::kStabilityLaunchCount);
605   pref->SetInteger(prefs::kStabilityLaunchCount, 0);
606   int crash_count = pref->GetInteger(prefs::kStabilityCrashCount);
607   pref->SetInteger(prefs::kStabilityCrashCount, 0);
608 
609   SystemProfileProto::Stability* stability =
610       uma_proto()->mutable_system_profile()->mutable_stability();
611   stability->set_launch_count(launch_count);
612   stability->set_crash_count(crash_count);
613 }
614 
WriteRealtimeStabilityAttributes(PrefService * pref,base::TimeDelta incremental_uptime)615 void MetricsLog::WriteRealtimeStabilityAttributes(
616     PrefService* pref,
617     base::TimeDelta incremental_uptime) {
618   // Update the stats which are critical for real-time stability monitoring.
619   // Since these are "optional," only list ones that are non-zero, as the counts
620   // are aggregated (summed) server side.
621 
622   SystemProfileProto::Stability* stability =
623       uma_proto()->mutable_system_profile()->mutable_stability();
624   int count = pref->GetInteger(prefs::kStabilityPageLoadCount);
625   if (count) {
626     stability->set_page_load_count(count);
627     pref->SetInteger(prefs::kStabilityPageLoadCount, 0);
628   }
629 
630   count = pref->GetInteger(prefs::kStabilityRendererCrashCount);
631   if (count) {
632     stability->set_renderer_crash_count(count);
633     pref->SetInteger(prefs::kStabilityRendererCrashCount, 0);
634   }
635 
636   count = pref->GetInteger(prefs::kStabilityExtensionRendererCrashCount);
637   if (count) {
638     stability->set_extension_renderer_crash_count(count);
639     pref->SetInteger(prefs::kStabilityExtensionRendererCrashCount, 0);
640   }
641 
642   count = pref->GetInteger(prefs::kStabilityRendererHangCount);
643   if (count) {
644     stability->set_renderer_hang_count(count);
645     pref->SetInteger(prefs::kStabilityRendererHangCount, 0);
646   }
647 
648   count = pref->GetInteger(prefs::kStabilityChildProcessCrashCount);
649   if (count) {
650     stability->set_child_process_crash_count(count);
651     pref->SetInteger(prefs::kStabilityChildProcessCrashCount, 0);
652   }
653 
654 #if defined(OS_CHROMEOS)
655   count = pref->GetInteger(prefs::kStabilityOtherUserCrashCount);
656   if (count) {
657     stability->set_other_user_crash_count(count);
658     pref->SetInteger(prefs::kStabilityOtherUserCrashCount, 0);
659   }
660 
661   count = pref->GetInteger(prefs::kStabilityKernelCrashCount);
662   if (count) {
663     stability->set_kernel_crash_count(count);
664     pref->SetInteger(prefs::kStabilityKernelCrashCount, 0);
665   }
666 
667   count = pref->GetInteger(prefs::kStabilitySystemUncleanShutdownCount);
668   if (count) {
669     stability->set_unclean_system_shutdown_count(count);
670     pref->SetInteger(prefs::kStabilitySystemUncleanShutdownCount, 0);
671   }
672 #endif  // OS_CHROMEOS
673 
674   const uint64 uptime_sec = incremental_uptime.InSeconds();
675   if (uptime_sec)
676     stability->set_uptime_sec(uptime_sec);
677 }
678 
WritePluginList(const std::vector<content::WebPluginInfo> & plugin_list)679 void MetricsLog::WritePluginList(
680     const std::vector<content::WebPluginInfo>& plugin_list) {
681   DCHECK(!locked());
682 
683 #if defined(ENABLE_PLUGINS)
684   PluginPrefs* plugin_prefs = GetPluginPrefs();
685   SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
686   for (std::vector<content::WebPluginInfo>::const_iterator iter =
687            plugin_list.begin();
688        iter != plugin_list.end(); ++iter) {
689     SystemProfileProto::Plugin* plugin = system_profile->add_plugin();
690     SetPluginInfo(*iter, plugin_prefs, plugin);
691   }
692 #endif  // defined(ENABLE_PLUGINS)
693 }
694 
RecordEnvironment(const std::vector<content::WebPluginInfo> & plugin_list,const GoogleUpdateMetrics & google_update_metrics,const std::vector<chrome_variations::ActiveGroupId> & synthetic_trials)695 void MetricsLog::RecordEnvironment(
696     const std::vector<content::WebPluginInfo>& plugin_list,
697     const GoogleUpdateMetrics& google_update_metrics,
698     const std::vector<chrome_variations::ActiveGroupId>& synthetic_trials) {
699   DCHECK(!HasEnvironment());
700 
701   SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
702 
703   std::string brand_code;
704   if (google_util::GetBrand(&brand_code))
705     system_profile->set_brand_code(brand_code);
706 
707   int enabled_date;
708   bool success = base::StringToInt(GetMetricsEnabledDate(GetPrefService()),
709                                    &enabled_date);
710   DCHECK(success);
711 
712   // Reduce granularity of the enabled_date field to nearest hour.
713   system_profile->set_uma_enabled_date(RoundSecondsToHour(enabled_date));
714 
715   int64 install_date = GetPrefService()->GetInt64(prefs::kInstallDate);
716 
717   // Reduce granularity of the install_date field to nearest hour.
718   system_profile->set_install_date(RoundSecondsToHour(install_date));
719 
720   system_profile->set_application_locale(
721       g_browser_process->GetApplicationLocale());
722 
723   SystemProfileProto::Hardware* hardware = system_profile->mutable_hardware();
724   hardware->set_cpu_architecture(base::SysInfo::OperatingSystemArchitecture());
725   hardware->set_system_ram_mb(base::SysInfo::AmountOfPhysicalMemoryMB());
726 #if defined(OS_WIN)
727   hardware->set_dll_base(reinterpret_cast<uint64>(&__ImageBase));
728 #endif
729 
730   SystemProfileProto::Network* network = system_profile->mutable_network();
731   network->set_connection_type_is_ambiguous(
732       network_observer_.connection_type_is_ambiguous());
733   network->set_connection_type(network_observer_.connection_type());
734   network->set_wifi_phy_layer_protocol_is_ambiguous(
735       network_observer_.wifi_phy_layer_protocol_is_ambiguous());
736   network->set_wifi_phy_layer_protocol(
737       network_observer_.wifi_phy_layer_protocol());
738   network_observer_.Reset();
739 
740   SystemProfileProto::OS* os = system_profile->mutable_os();
741   std::string os_name = base::SysInfo::OperatingSystemName();
742 #if defined(OS_WIN)
743   // TODO(mad): This only checks whether the main process is a Metro process at
744   // upload time; not whether the collected metrics were all gathered from
745   // Metro.  This is ok as an approximation for now, since users will rarely be
746   // switching from Metro to Desktop mode; but we should re-evaluate whether we
747   // can distinguish metrics more cleanly in the future: http://crbug.com/140568
748   if (base::win::IsMetroProcess())
749     os_name += " (Metro)";
750 #endif
751   os->set_name(os_name);
752   os->set_version(base::SysInfo::OperatingSystemVersion());
753 #if defined(OS_ANDROID)
754   os->set_fingerprint(
755       base::android::BuildInfo::GetInstance()->android_build_fp());
756 #endif
757 
758   base::CPU cpu_info;
759   SystemProfileProto::Hardware::CPU* cpu = hardware->mutable_cpu();
760   cpu->set_vendor_name(cpu_info.vendor_name());
761   cpu->set_signature(cpu_info.signature());
762 
763   const gpu::GPUInfo& gpu_info =
764       GpuDataManager::GetInstance()->GetGPUInfo();
765   SystemProfileProto::Hardware::Graphics* gpu = hardware->mutable_gpu();
766   gpu->set_vendor_id(gpu_info.gpu.vendor_id);
767   gpu->set_device_id(gpu_info.gpu.device_id);
768   gpu->set_driver_version(gpu_info.driver_version);
769   gpu->set_driver_date(gpu_info.driver_date);
770   SystemProfileProto::Hardware::Graphics::PerformanceStatistics*
771       gpu_performance = gpu->mutable_performance_statistics();
772   gpu_performance->set_graphics_score(gpu_info.performance_stats.graphics);
773   gpu_performance->set_gaming_score(gpu_info.performance_stats.gaming);
774   gpu_performance->set_overall_score(gpu_info.performance_stats.overall);
775   gpu->set_gl_vendor(gpu_info.gl_vendor);
776   gpu->set_gl_renderer(gpu_info.gl_renderer);
777 
778   const gfx::Size display_size = GetScreenSize();
779   hardware->set_primary_screen_width(display_size.width());
780   hardware->set_primary_screen_height(display_size.height());
781   hardware->set_primary_screen_scale_factor(GetScreenDeviceScaleFactor());
782   hardware->set_screen_count(GetScreenCount());
783 
784 #if defined(OS_WIN)
785   WriteScreenDPIInformationProto(hardware);
786 #endif
787 
788   WriteGoogleUpdateProto(google_update_metrics);
789 
790   WritePluginList(plugin_list);
791 
792   std::vector<ActiveGroupId> field_trial_ids;
793   GetFieldTrialIds(&field_trial_ids);
794   WriteFieldTrials(field_trial_ids, system_profile);
795   WriteFieldTrials(synthetic_trials, system_profile);
796 
797 #if defined(OS_CHROMEOS)
798   PerfDataProto perf_data_proto;
799   if (perf_provider_.GetPerfData(&perf_data_proto))
800     uma_proto()->add_perf_data()->Swap(&perf_data_proto);
801 
802   // BluetoothAdapterFactory::GetAdapter is synchronous on Chrome OS; if that
803   // changes this will fail at the DCHECK().
804   device::BluetoothAdapterFactory::GetAdapter(
805       base::Bind(&MetricsLog::SetBluetoothAdapter,
806                  base::Unretained(this)));
807   DCHECK(adapter_.get());
808   WriteBluetoothProto(hardware);
809   UpdateMultiProfileUserCount();
810 #endif
811 
812   std::string serialied_system_profile;
813   std::string base64_system_profile;
814   if (system_profile->SerializeToString(&serialied_system_profile)) {
815     base::Base64Encode(serialied_system_profile, &base64_system_profile);
816     PrefService* local_state = GetPrefService();
817     local_state->SetString(prefs::kStabilitySavedSystemProfile,
818                            base64_system_profile);
819     local_state->SetString(prefs::kStabilitySavedSystemProfileHash,
820                            ComputeSHA1(serialied_system_profile));
821   }
822 }
823 
LoadSavedEnvironmentFromPrefs()824 bool MetricsLog::LoadSavedEnvironmentFromPrefs() {
825   PrefService* local_state = GetPrefService();
826   const std::string base64_system_profile =
827       local_state->GetString(prefs::kStabilitySavedSystemProfile);
828   if (base64_system_profile.empty())
829     return false;
830 
831   const std::string system_profile_hash =
832       local_state->GetString(prefs::kStabilitySavedSystemProfileHash);
833   local_state->ClearPref(prefs::kStabilitySavedSystemProfile);
834   local_state->ClearPref(prefs::kStabilitySavedSystemProfileHash);
835 
836   SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
837   std::string serialied_system_profile;
838   return base::Base64Decode(base64_system_profile, &serialied_system_profile) &&
839          ComputeSHA1(serialied_system_profile) == system_profile_hash &&
840          system_profile->ParseFromString(serialied_system_profile);
841 }
842 
RecordProfilerData(const tracked_objects::ProcessDataSnapshot & process_data,int process_type)843 void MetricsLog::RecordProfilerData(
844     const tracked_objects::ProcessDataSnapshot& process_data,
845     int process_type) {
846   DCHECK(!locked());
847 
848   if (tracked_objects::GetTimeSourceType() !=
849           tracked_objects::TIME_SOURCE_TYPE_WALL_TIME) {
850     // We currently only support the default time source, wall clock time.
851     return;
852   }
853 
854   ProfilerEventProto* profile;
855   if (!uma_proto()->profiler_event_size()) {
856     // For the first process's data, add a new field to the protocol buffer.
857     profile = uma_proto()->add_profiler_event();
858     profile->set_profile_type(ProfilerEventProto::STARTUP_PROFILE);
859     profile->set_time_source(ProfilerEventProto::WALL_CLOCK_TIME);
860   } else {
861     // For the remaining calls, re-use the existing field.
862     profile = uma_proto()->mutable_profiler_event(0);
863   }
864 
865   WriteProfilerData(process_data, process_type, profile);
866 }
867 
RecordOmniboxOpenedURL(const OmniboxLog & log)868 void MetricsLog::RecordOmniboxOpenedURL(const OmniboxLog& log) {
869   DCHECK(!locked());
870 
871   std::vector<base::string16> terms;
872   const int num_terms =
873       static_cast<int>(Tokenize(log.text, base::kWhitespaceUTF16, &terms));
874 
875   OmniboxEventProto* omnibox_event = uma_proto()->add_omnibox_event();
876   omnibox_event->set_time(MetricsLogBase::GetCurrentTime());
877   if (log.tab_id != -1) {
878     // If we know what tab the autocomplete URL was opened in, log it.
879     omnibox_event->set_tab_id(log.tab_id);
880   }
881   omnibox_event->set_typed_length(log.text.length());
882   omnibox_event->set_just_deleted_text(log.just_deleted_text);
883   omnibox_event->set_num_typed_terms(num_terms);
884   omnibox_event->set_selected_index(log.selected_index);
885   if (log.completed_length != base::string16::npos)
886     omnibox_event->set_completed_length(log.completed_length);
887   if (log.elapsed_time_since_user_first_modified_omnibox !=
888       base::TimeDelta::FromMilliseconds(-1)) {
889     // Only upload the typing duration if it is set/valid.
890     omnibox_event->set_typing_duration_ms(
891         log.elapsed_time_since_user_first_modified_omnibox.InMilliseconds());
892   }
893   omnibox_event->set_duration_since_last_default_match_update_ms(
894       log.elapsed_time_since_last_change_to_default_match.InMilliseconds());
895   omnibox_event->set_current_page_classification(
896       AsOmniboxEventPageClassification(log.current_page_classification));
897   omnibox_event->set_input_type(AsOmniboxEventInputType(log.input_type));
898   omnibox_event->set_is_top_result_hidden_in_dropdown(
899       log.result.ShouldHideTopMatch());
900 
901   for (AutocompleteResult::const_iterator i(log.result.begin());
902        i != log.result.end(); ++i) {
903     OmniboxEventProto::Suggestion* suggestion = omnibox_event->add_suggestion();
904     suggestion->set_provider(i->provider->AsOmniboxEventProviderType());
905     suggestion->set_result_type(AsOmniboxEventResultType(i->type));
906     suggestion->set_relevance(i->relevance);
907     if (i->typed_count != -1)
908       suggestion->set_typed_count(i->typed_count);
909     suggestion->set_is_starred(i->starred);
910   }
911   for (ProvidersInfo::const_iterator i(log.providers_info.begin());
912        i != log.providers_info.end(); ++i) {
913     OmniboxEventProto::ProviderInfo* provider_info =
914         omnibox_event->add_provider_info();
915     provider_info->CopyFrom(*i);
916   }
917 
918   ++num_events_;
919 }
920 
WriteGoogleUpdateProto(const GoogleUpdateMetrics & google_update_metrics)921 void MetricsLog::WriteGoogleUpdateProto(
922     const GoogleUpdateMetrics& google_update_metrics) {
923 #if defined(GOOGLE_CHROME_BUILD) && defined(OS_WIN)
924   SystemProfileProto::GoogleUpdate* google_update =
925       uma_proto()->mutable_system_profile()->mutable_google_update();
926 
927   google_update->set_is_system_install(google_update_metrics.is_system_install);
928 
929   if (!google_update_metrics.last_started_au.is_null()) {
930     google_update->set_last_automatic_start_timestamp(
931         google_update_metrics.last_started_au.ToTimeT());
932   }
933 
934   if (!google_update_metrics.last_checked.is_null()) {
935     google_update->set_last_update_check_timestamp(
936       google_update_metrics.last_checked.ToTimeT());
937   }
938 
939   if (!google_update_metrics.google_update_data.version.empty()) {
940     ProductDataToProto(google_update_metrics.google_update_data,
941                        google_update->mutable_google_update_status());
942   }
943 
944   if (!google_update_metrics.product_data.version.empty()) {
945     ProductDataToProto(google_update_metrics.product_data,
946                        google_update->mutable_client_status());
947   }
948 #endif  // defined(GOOGLE_CHROME_BUILD) && defined(OS_WIN)
949 }
950 
SetBluetoothAdapter(scoped_refptr<device::BluetoothAdapter> adapter)951 void MetricsLog::SetBluetoothAdapter(
952     scoped_refptr<device::BluetoothAdapter> adapter) {
953   adapter_ = adapter;
954 }
955 
WriteBluetoothProto(SystemProfileProto::Hardware * hardware)956 void MetricsLog::WriteBluetoothProto(
957     SystemProfileProto::Hardware* hardware) {
958 #if defined(OS_CHROMEOS)
959   SystemProfileProto::Hardware::Bluetooth* bluetooth =
960       hardware->mutable_bluetooth();
961 
962   bluetooth->set_is_present(adapter_->IsPresent());
963   bluetooth->set_is_enabled(adapter_->IsPowered());
964 
965   device::BluetoothAdapter::DeviceList devices = adapter_->GetDevices();
966   for (device::BluetoothAdapter::DeviceList::iterator iter =
967            devices.begin(); iter != devices.end(); ++iter) {
968     PairedDevice* paired_device = bluetooth->add_paired_device();
969 
970     device::BluetoothDevice* device = *iter;
971     paired_device->set_bluetooth_class(device->GetBluetoothClass());
972     paired_device->set_type(AsBluetoothDeviceType(device->GetDeviceType()));
973 
974     // address is xx:xx:xx:xx:xx:xx, extract the first three components and
975     // pack into a uint32
976     std::string address = device->GetAddress();
977     if (address.size() > 9 &&
978         address[2] == ':' && address[5] == ':' && address[8] == ':') {
979       std::string vendor_prefix_str;
980       uint64 vendor_prefix;
981 
982       base::RemoveChars(address.substr(0, 9), ":", &vendor_prefix_str);
983       DCHECK_EQ(6U, vendor_prefix_str.size());
984       base::HexStringToUInt64(vendor_prefix_str, &vendor_prefix);
985 
986       paired_device->set_vendor_prefix(vendor_prefix);
987     }
988 
989     paired_device->set_vendor_id(device->GetVendorID());
990     paired_device->set_product_id(device->GetProductID());
991     paired_device->set_device_id(device->GetDeviceID());
992   }
993 #endif  // defined(OS_CHROMEOS)
994 }
995 
996 #if defined(OS_CHROMEOS)
UpdateMultiProfileUserCount()997 void MetricsLog::UpdateMultiProfileUserCount() {
998   if (chromeos::UserManager::IsInitialized() &&
999       chromeos::UserManager::Get()->IsMultipleProfilesAllowed()) {
1000     uint32 user_count = chromeos::UserManager::Get()
1001         ->GetLoggedInUsers().size();
1002     SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
1003 
1004     // We invalidate the user count if it changed while the log was open.
1005     if (system_profile->has_multi_profile_user_count() &&
1006         user_count != system_profile->multi_profile_user_count())
1007       user_count = 0;
1008 
1009     system_profile->set_multi_profile_user_count(user_count);
1010   }
1011 }
1012 #endif
1013