1 // Copyright (c) 2010 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 // nacl_histogram provides an enum and defines a macro that uses definitions 6 // from histogram.h. Note that a histogram is an object that aggregates 7 // statistics, and can summarize them in various forms, including ASCII 8 // graphical, HTML, and numerically. 9 // nacl_histogram information is used to compare how many times a native 10 // client module has been loaded, compared to the number of chrome starts 11 // and number of new tabs created. 12 13 #ifndef BASE_METRICS_NACL_HISTOGRAM_H_ 14 #define BASE_METRICS_NACL_HISTOGRAM_H_ 15 #pragma once 16 17 enum NaClHistogramValue { 18 FIRST_TAB_NACL_BASELINE, // First tab created - a baseline for NaCl starts. 19 NEW_TAB_NACL_BASELINE, // New tab created -- a baseline for NaCl starts. 20 NACL_STARTED, // NaCl process started 21 NACL_MAX_HISTOGRAM // DO NOT USE -- used by histogram for max bound. 22 }; 23 24 // To log histogram data about NaCl.Startups, call this macro with 25 // a NaClHistogramValue passed in as |histogram_value| 26 void UmaNaclHistogramEnumeration(NaClHistogramValue histogram_value); 27 28 #endif // BASE_METRICS_NACL_HISTOGRAM_H_ 29 30