chrome/browser/chrome_browser_field_trials_desktop.cc

   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/metrics/field_trial.h"
  11 #include "base/prefs/pref_service.h"
  12 #include "base/strings/string_util.h"
  13 #include "chrome/browser/auto_launch_trial.h"
  14 #include "chrome/browser/google/google_brand.h"
  15 #include "chrome/browser/prerender/prerender_field_trial.h"
  16 #include "chrome/browser/profiles/profiles_state.h"
  17 #include "chrome/browser/safe_browsing/safe_browsing_blocking_page.h"
  18 #include "chrome/browser/ui/app_list/app_list_util.h"
  19 #include "chrome/browser/ui/sync/one_click_signin_helper.h"
  20 #include "chrome/common/chrome_switches.h"
  21 #include "chrome/common/chrome_version_info.h"
  22 #include "chrome/common/variations/variations_util.h"
  23 #include "content/public/common/content_constants.h"
  24 #include "net/spdy/spdy_session.h"
  25 #include "ui/base/layout.h"
  26
  27 namespace chrome {
  28
  29 namespace {
  30
  31 void AutoLaunchChromeFieldTrial() {
  32   std::string brand;
  33   google_brand::GetBrand(&brand);
  34
  35   // Create a 100% field trial based on the brand code.
  36   if (auto_launch_trial::IsInExperimentGroup(brand)) {
  37     base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
  38                                            kAutoLaunchTrialAutoLaunchGroup);
  39   } else if (auto_launch_trial::IsInControlGroup(brand)) {
  40     base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
  41                                            kAutoLaunchTrialControlGroup);
  42   }
  43 }
  44
  45 void SetupInfiniteCacheFieldTrial() {
  46   const base::FieldTrial::Probability kDivisor = 100;
  47
  48   base::FieldTrial::Probability infinite_cache_probability = 0;
  49
  50   scoped_refptr<base::FieldTrial> trial(
  51       base::FieldTrialList::FactoryGetFieldTrial(
  52           "InfiniteCache", kDivisor, "No", 2013, 12, 31,
  53           base::FieldTrial::ONE_TIME_RANDOMIZED, NULL));
  54   trial->AppendGroup("Yes", infinite_cache_probability);
  55   trial->AppendGroup("Control", infinite_cache_probability);
  56 }
  57
  58 void DisableShowProfileSwitcherTrialIfNecessary() {
  59   // This trial is created by the VariationsService, but it needs to be disabled
  60   // if multi-profiles isn't enabled.
  61   base::FieldTrial* trial = base::FieldTrialList::Find("ShowProfileSwitcher");
  62   if (trial && !profiles::IsMultipleProfilesEnabled())
  63     trial->Disable();
  64 }
  65
  66 }  // namespace
  67
  68 void SetupDesktopFieldTrials(const base::CommandLine& parsed_command_line,
  69                              PrefService* local_state) {
  70   prerender::ConfigurePrerender(parsed_command_line);
  71   AutoLaunchChromeFieldTrial();
  72   SetupInfiniteCacheFieldTrial();
  73   DisableShowProfileSwitcherTrialIfNecessary();
  74   SetupShowAppLauncherPromoFieldTrial(local_state);
  75 }
  76
  77 }  // namespace chrome