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/common/chrome_switches.h"
  15 #include "chrome/common/chrome_version_info.h"
  16 #include "components/metrics/metrics_pref_names.h"
  17 #include "components/omnibox/omnibox_field_trial.h"
  18
  19 #if defined(OS_ANDROID) || defined(OS_IOS)
  20 #include "chrome/browser/chrome_browser_field_trials_mobile.h"
  21 #else
  22 #include "chrome/browser/chrome_browser_field_trials_desktop.h"
  23 #endif
  24
  25 ChromeBrowserFieldTrials::ChromeBrowserFieldTrials(
  26     const base::CommandLine& parsed_command_line)
  27     : parsed_command_line_(parsed_command_line) {
  28 }
  29
  30 ChromeBrowserFieldTrials::~ChromeBrowserFieldTrials() {
  31 }
  32
  33 void ChromeBrowserFieldTrials::SetupFieldTrials(const base::Time& install_time,
  34                                                 PrefService* local_state) {
  35   DCHECK(!install_time.is_null());
  36
  37   // Field trials that are shared by all platforms.
  38   InstantiateDynamicTrials();
  39
  40 #if defined(OS_ANDROID) || defined(OS_IOS)
  41   chrome::SetupMobileFieldTrials(parsed_command_line_);
  42 #else
  43   chrome::SetupDesktopFieldTrials(
  44       parsed_command_line_, local_state);
  45 #endif
  46 }
  47
  48 void ChromeBrowserFieldTrials::InstantiateDynamicTrials() {
  49   // The following trials are used from renderer process.
  50   // Mark here so they will be sync-ed.
  51   base::FieldTrialList::FindValue("CLD1VsCLD2");
  52   base::FieldTrialList::FindValue("MouseEventPreconnect");
  53   base::FieldTrialList::FindValue("DisplayList2dCanvas");
  54   // Activate the autocomplete dynamic field trials.
  55   OmniboxFieldTrial::ActivateDynamicTrials();
  56 }