1 // Copyright 2013 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/chrome_browser_field_trials_desktop.h"
6
7 #include <string>
8
9 #include "base/command_line.h"
10 #include "base/environment.h"
11 #include "base/metrics/field_trial.h"
12 #include "base/prefs/pref_service.h"
13 #include "base/strings/string_util.h"
14 #include "chrome/browser/auto_launch_trial.h"
15 #include "chrome/browser/google/google_brand.h"
16 #include "chrome/browser/omnibox/omnibox_field_trial.h"
17 #include "chrome/browser/prerender/prerender_field_trial.h"
18 #include "chrome/browser/profiles/profiles_state.h"
19 #include "chrome/browser/safe_browsing/safe_browsing_blocking_page.h"
20 #include "chrome/browser/ui/app_list/app_list_util.h"
21 #include "chrome/browser/ui/sync/one_click_signin_helper.h"
22 #include "chrome/common/chrome_constants.h"
23 #include "chrome/common/chrome_switches.h"
24 #include "chrome/common/chrome_version_info.h"
25 #include "chrome/common/pref_names.h"
26 #include "chrome/common/variations/variations_util.h"
27 #include "content/public/common/content_constants.h"
28 #include "net/spdy/spdy_session.h"
29 #include "ui/base/layout.h"
30
31 #if defined(OS_CHROMEOS)
32 #include "chrome/browser/chromeos/login/users/user_manager.h"
33 #endif
34
35 namespace chrome {
36
37 namespace {
38
AutoLaunchChromeFieldTrial()39 void AutoLaunchChromeFieldTrial() {
40 std::string brand;
41 google_brand::GetBrand(&brand);
42
43 // Create a 100% field trial based on the brand code.
44 if (auto_launch_trial::IsInExperimentGroup(brand)) {
45 base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
46 kAutoLaunchTrialAutoLaunchGroup);
47 } else if (auto_launch_trial::IsInControlGroup(brand)) {
48 base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
49 kAutoLaunchTrialControlGroup);
50 }
51 }
52
SetupInfiniteCacheFieldTrial()53 void SetupInfiniteCacheFieldTrial() {
54 const base::FieldTrial::Probability kDivisor = 100;
55
56 base::FieldTrial::Probability infinite_cache_probability = 0;
57
58 scoped_refptr<base::FieldTrial> trial(
59 base::FieldTrialList::FactoryGetFieldTrial(
60 "InfiniteCache", kDivisor, "No", 2013, 12, 31,
61 base::FieldTrial::ONE_TIME_RANDOMIZED, NULL));
62 trial->AppendGroup("Yes", infinite_cache_probability);
63 trial->AppendGroup("Control", infinite_cache_probability);
64 }
65
DisableShowProfileSwitcherTrialIfNecessary()66 void DisableShowProfileSwitcherTrialIfNecessary() {
67 // This trial is created by the VariationsService, but it needs to be disabled
68 // if multi-profiles isn't enabled.
69 base::FieldTrial* trial = base::FieldTrialList::Find("ShowProfileSwitcher");
70 if (trial && !profiles::IsMultipleProfilesEnabled())
71 trial->Disable();
72 }
73
SetupPreReadFieldTrial()74 void SetupPreReadFieldTrial() {
75 // The chrome executable will have set (or not) an environment variable with
76 // the group name into which this client belongs.
77 std::string group;
78 scoped_ptr<base::Environment> env(base::Environment::Create());
79 if (!env->GetVar(chrome::kPreReadEnvironmentVariable, &group) ||
80 group.empty()) {
81 return;
82 }
83
84 // Initialize the field trial. We declare all of the groups here (so that
85 // the dashboard creation tools can find them) but force the probability
86 // of being assigned to the group already chosen by the executable, if any,
87 // to 100%.
88 scoped_refptr<base::FieldTrial> trial(
89 base::FieldTrialList::FactoryGetFieldTrial(
90 "BrowserPreReadExperiment", 100, "100-pct-default",
91 2014, 7, 1, base::FieldTrial::SESSION_RANDOMIZED, NULL));
92 trial->AppendGroup("100-pct-control", group == "100-pct-control" ? 100 : 0);
93 trial->AppendGroup("95-pct", group == "95-pct" ? 100 : 0);
94 trial->AppendGroup("90-pct", group == "90-pct" ? 100 : 0);
95 trial->AppendGroup("85-pct", group == "85-pct" ? 100 : 0);
96 trial->AppendGroup("80-pct", group == "80-pct" ? 100 : 0);
97 trial->AppendGroup("75-pct", group == "75-pct" ? 100 : 0);
98 trial->AppendGroup("70-pct", group == "70-pct" ? 100 : 0);
99 trial->AppendGroup("65-pct", group == "65-pct" ? 100 : 0);
100 trial->AppendGroup("60-pct", group == "60-pct" ? 100 : 0);
101 trial->AppendGroup("55-pct", group == "55-pct" ? 100 : 0);
102 trial->AppendGroup("50-pct", group == "50-pct" ? 100 : 0);
103 trial->AppendGroup("45-pct", group == "45-pct" ? 100 : 0);
104 trial->AppendGroup("40-pct", group == "40-pct" ? 100 : 0);
105 trial->AppendGroup("35-pct", group == "35-pct" ? 100 : 0);
106 trial->AppendGroup("30-pct", group == "30-pct" ? 100 : 0);
107 trial->AppendGroup("25-pct", group == "25-pct" ? 100 : 0);
108 trial->AppendGroup("20-pct", group == "20-pct" ? 100 : 0);
109 trial->AppendGroup("15-pct", group == "15-pct" ? 100 : 0);
110 trial->AppendGroup("10-pct", group == "10-pct" ? 100 : 0);
111 trial->AppendGroup("5-pct", group == "5-pct" ? 100 : 0);
112 trial->AppendGroup("0-pct", group == "0-pct" ? 100 : 0);
113
114 // We have to call group in order to mark the experiment as active.
115 trial->group();
116 }
117
118 } // namespace
119
SetupDesktopFieldTrials(const CommandLine & parsed_command_line,const base::Time & install_time,PrefService * local_state)120 void SetupDesktopFieldTrials(const CommandLine& parsed_command_line,
121 const base::Time& install_time,
122 PrefService* local_state) {
123 prerender::ConfigurePrerender(parsed_command_line);
124 AutoLaunchChromeFieldTrial();
125 OmniboxFieldTrial::ActivateStaticTrials();
126 SetupInfiniteCacheFieldTrial();
127 DisableShowProfileSwitcherTrialIfNecessary();
128 SetupShowAppLauncherPromoFieldTrial(local_state);
129 SetupPreReadFieldTrial();
130 }
131
132 } // namespace chrome
133