chrome/browser/chrome_browser_field_trials.cc

   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/chrome_browser_field_trials.h"
   6
   7 #include <string>
   8
   9 #include "base/command_line.h"
  10 #include "base/metrics/field_trial.h"
  11 #include "base/prefs/pref_service.h"
  12 #include "base/strings/string_util.h"
  13 #include "base/time/time.h"
  14 #include "chrome/browser/omnibox/omnibox_field_trial.h"
  15 #include "chrome/common/chrome_switches.h"
  16 #include "chrome/common/chrome_version_info.h"
  17 #include "chrome/common/metrics/variations/uniformity_field_trials.h"
  18 #include "chrome/common/pref_names.h"
  19
  20 #if defined(OS_ANDROID) || defined(OS_IOS)
  21 #include "chrome/browser/chrome_browser_field_trials_mobile.h"
  22 #else
  23 #include "chrome/browser/chrome_browser_field_trials_desktop.h"
  24 #endif
  25
  26 ChromeBrowserFieldTrials::ChromeBrowserFieldTrials(
  27     const CommandLine& parsed_command_line)
  28     : parsed_command_line_(parsed_command_line) {
  29 }
  30
  31 ChromeBrowserFieldTrials::~ChromeBrowserFieldTrials() {
  32 }
  33
  34 void ChromeBrowserFieldTrials::SetupFieldTrials(PrefService* local_state) {
  35   const base::Time install_time = base::Time::FromTimeT(
  36       local_state->GetInt64(prefs::kInstallDate));
  37   DCHECK(!install_time.is_null());
  38
  39   // Field trials that are shared by all platforms.
  40   chrome_variations::SetupUniformityFieldTrials(install_time);
  41   InstantiateDynamicTrials();
  42
  43 #if defined(OS_ANDROID) || defined(OS_IOS)
  44   chrome::SetupMobileFieldTrials(
  45       parsed_command_line_, install_time, local_state);
  46 #else
  47   chrome::SetupDesktopFieldTrials(
  48       parsed_command_line_, install_time, local_state);
  49 #endif
  50 }
  51
  52 void ChromeBrowserFieldTrials::InstantiateDynamicTrials() {
  53   // Call |FindValue()| on the trials below, which may come from the server, to
  54   // ensure they get marked as "used" for the purposes of data reporting.
  55   base::FieldTrialList::FindValue("UMA-Dynamic-Binary-Uniformity-Trial");
  56   base::FieldTrialList::FindValue("UMA-Dynamic-Uniformity-Trial");
  57   base::FieldTrialList::FindValue("InstantDummy");
  58   base::FieldTrialList::FindValue("InstantChannel");
  59   base::FieldTrialList::FindValue("Test0PercentDefault");
  60   // MouseEventPreconnect trial is used from renderer process.
  61   // Mark here so it will be sync-ed.
  62   base::FieldTrialList::FindValue("MouseEventPreconnect");
  63   // Activate the autocomplete dynamic field trials.
  64   OmniboxFieldTrial::ActivateDynamicTrials();
  65 }