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/strings/string_util.h"
  12 #include "chrome/browser/auto_launch_trial.h"
  13 #include "chrome/browser/google/google_brand.h"
  14 #include "chrome/browser/prerender/prerender_field_trial.h"
  15 #include "chrome/browser/profiles/profiles_state.h"
  16 #include "chrome/browser/safe_browsing/safe_browsing_blocking_page.h"
  17 #include "chrome/browser/ui/sync/one_click_signin_helper.h"
  18 #include "chrome/common/chrome_switches.h"
  19 #include "chrome/common/chrome_version_info.h"
  20 #include "chrome/common/variations/variations_util.h"
  21 #include "components/variations/variations_associated_data.h"
  22 #include "content/public/common/content_constants.h"
  23 #include "net/spdy/spdy_session.h"
  24 #include "ui/base/layout.h"
  25
  26 namespace chrome {
  27
  28 namespace {
  29
  30 void AutoLaunchChromeFieldTrial() {
  31   std::string brand;
  32   google_brand::GetBrand(&brand);
  33
  34   // Create a 100% field trial based on the brand code.
  35   if (auto_launch_trial::IsInExperimentGroup(brand)) {
  36     base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
  37                                            kAutoLaunchTrialAutoLaunchGroup);
  38   } else if (auto_launch_trial::IsInControlGroup(brand)) {
  39     base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
  40                                            kAutoLaunchTrialControlGroup);
  41   }
  42 }
  43
  44 void SetupInfiniteCacheFieldTrial() {
  45   const base::FieldTrial::Probability kDivisor = 100;
  46
  47   base::FieldTrial::Probability infinite_cache_probability = 0;
  48
  49   scoped_refptr<base::FieldTrial> trial(
  50       base::FieldTrialList::FactoryGetFieldTrial(
  51           "InfiniteCache", kDivisor, "No", 2013, 12, 31,
  52           base::FieldTrial::ONE_TIME_RANDOMIZED, NULL));
  53   trial->AppendGroup("Yes", infinite_cache_probability);
  54   trial->AppendGroup("Control", infinite_cache_probability);
  55 }
  56
  57 void DisableShowProfileSwitcherTrialIfNecessary() {
  58   // This trial is created by the VariationsService, but it needs to be disabled
  59   // if multi-profiles isn't enabled.
  60   base::FieldTrial* trial = base::FieldTrialList::Find("ShowProfileSwitcher");
  61   if (trial && !profiles::IsMultipleProfilesEnabled())
  62     trial->Disable();
  63 }
  64
  65 void SetupLightSpeedTrials() {
  66   if (!variations::GetVariationParamValue("LightSpeed", "NoGpu").empty()) {
  67     base::CommandLine::ForCurrentProcess()->AppendSwitch(
  68         switches::kDisableGpu);
  69   }
  70 }
  71
  72 }  // namespace
  73
  74 void SetupDesktopFieldTrials(const base::CommandLine& parsed_command_line) {
  75   prerender::ConfigurePrerender(parsed_command_line);
  76   AutoLaunchChromeFieldTrial();
  77   SetupInfiniteCacheFieldTrial();
  78   DisableShowProfileSwitcherTrialIfNecessary();
  79   SetupLightSpeedTrials();
  80 }
  81
  82 }  // namespace chrome