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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/chrome_browser_field_trials_desktop.h" | 5 #include "chrome/browser/chrome_browser_field_trials_desktop.h" |
6 | 6 |
7 #include <string> | 7 #include <string> |
8 | 8 |
9 #include "apps/field_trial_names.h" | 9 #include "apps/field_trial_names.h" |
10 #include "apps/pref_names.h" | 10 #include "apps/pref_names.h" |
11 #include "base/command_line.h" | 11 #include "base/command_line.h" |
| 12 #include "base/environment.h" |
12 #include "base/metrics/field_trial.h" | 13 #include "base/metrics/field_trial.h" |
13 #include "base/prefs/pref_service.h" | 14 #include "base/prefs/pref_service.h" |
14 #include "base/strings/string_util.h" | 15 #include "base/strings/string_util.h" |
15 #include "chrome/browser/auto_launch_trial.h" | 16 #include "chrome/browser/auto_launch_trial.h" |
16 #include "chrome/browser/google/google_util.h" | 17 #include "chrome/browser/google/google_util.h" |
17 #include "chrome/browser/gpu/chrome_gpu_util.h" | 18 #include "chrome/browser/gpu/chrome_gpu_util.h" |
18 #include "chrome/browser/omnibox/omnibox_field_trial.h" | 19 #include "chrome/browser/omnibox/omnibox_field_trial.h" |
19 #include "chrome/browser/prerender/prerender_field_trial.h" | 20 #include "chrome/browser/prerender/prerender_field_trial.h" |
20 #include "chrome/browser/profiles/profiles_state.h" | 21 #include "chrome/browser/profiles/profiles_state.h" |
21 #include "chrome/browser/safe_browsing/safe_browsing_blocking_page.h" | 22 #include "chrome/browser/safe_browsing/safe_browsing_blocking_page.h" |
22 #include "chrome/browser/ui/sync/one_click_signin_helper.h" | 23 #include "chrome/browser/ui/sync/one_click_signin_helper.h" |
| 24 #include "chrome/common/chrome_constants.h" |
23 #include "chrome/common/chrome_switches.h" | 25 #include "chrome/common/chrome_switches.h" |
24 #include "chrome/common/chrome_version_info.h" | 26 #include "chrome/common/chrome_version_info.h" |
25 #include "chrome/common/metrics/variations/variations_util.h" | 27 #include "chrome/common/metrics/variations/variations_util.h" |
26 #include "content/public/common/content_constants.h" | 28 #include "content/public/common/content_constants.h" |
27 #include "net/spdy/spdy_session.h" | 29 #include "net/spdy/spdy_session.h" |
28 #include "ui/base/layout.h" | 30 #include "ui/base/layout.h" |
29 | 31 |
30 namespace chrome { | 32 namespace chrome { |
31 | 33 |
32 namespace { | 34 namespace { |
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84 scoped_refptr<base::FieldTrial> trial( | 86 scoped_refptr<base::FieldTrial> trial( |
85 base::FieldTrialList::FactoryGetFieldTrial( | 87 base::FieldTrialList::FactoryGetFieldTrial( |
86 content::kLowLatencyFlashAudioFieldTrialName, 100, "Standard", | 88 content::kLowLatencyFlashAudioFieldTrialName, 100, "Standard", |
87 2013, 9, 1, base::FieldTrial::SESSION_RANDOMIZED, NULL)); | 89 2013, 9, 1, base::FieldTrial::SESSION_RANDOMIZED, NULL)); |
88 | 90 |
89 // Trial is enabled for dev / beta / canary users only. | 91 // Trial is enabled for dev / beta / canary users only. |
90 if (chrome::VersionInfo::GetChannel() != chrome::VersionInfo::CHANNEL_STABLE) | 92 if (chrome::VersionInfo::GetChannel() != chrome::VersionInfo::CHANNEL_STABLE) |
91 trial->AppendGroup(content::kLowLatencyFlashAudioFieldTrialEnabledName, 25); | 93 trial->AppendGroup(content::kLowLatencyFlashAudioFieldTrialEnabledName, 25); |
92 } | 94 } |
93 | 95 |
| 96 void SetupPreReadFieldTrial() { |
| 97 // The chrome executable will have set (or not) an environment variable with |
| 98 // the group name into which this client belongs. |
| 99 std::string group; |
| 100 scoped_ptr<base::Environment> env(base::Environment::Create()); |
| 101 if (!env->GetVar(chrome::kPreReadEnvironmentVariable, &group) || |
| 102 group.empty()) { |
| 103 return; |
| 104 } |
| 105 |
| 106 // Initialize the field trial. We declare all of the groups here (so that |
| 107 // the dashboard creation tools can find them) but force the probability |
| 108 // of being assigned to the group already chosen by the executable, if any, |
| 109 // to 100%. |
| 110 scoped_refptr<base::FieldTrial> trial( |
| 111 base::FieldTrialList::FactoryGetFieldTrial( |
| 112 "BrowserPreReadExperiment", 100, "100-pct-default", |
| 113 2014, 7, 1, base::FieldTrial::SESSION_RANDOMIZED, NULL)); |
| 114 trial->AppendGroup("100-pct-control", group == "100-pct-control" ? 100 : 0); |
| 115 trial->AppendGroup("95-pct", group == "95-pct" ? 100 : 0); |
| 116 trial->AppendGroup("90-pct", group == "90-pct" ? 100 : 0); |
| 117 trial->AppendGroup("85-pct", group == "85-pct" ? 100 : 0); |
| 118 trial->AppendGroup("80-pct", group == "80-pct" ? 100 : 0); |
| 119 trial->AppendGroup("75-pct", group == "75-pct" ? 100 : 0); |
| 120 trial->AppendGroup("70-pct", group == "70-pct" ? 100 : 0); |
| 121 trial->AppendGroup("65-pct", group == "65-pct" ? 100 : 0); |
| 122 trial->AppendGroup("60-pct", group == "60-pct" ? 100 : 0); |
| 123 trial->AppendGroup("55-pct", group == "55-pct" ? 100 : 0); |
| 124 trial->AppendGroup("50-pct", group == "50-pct" ? 100 : 0); |
| 125 trial->AppendGroup("45-pct", group == "45-pct" ? 100 : 0); |
| 126 trial->AppendGroup("40-pct", group == "40-pct" ? 100 : 0); |
| 127 trial->AppendGroup("35-pct", group == "35-pct" ? 100 : 0); |
| 128 trial->AppendGroup("30-pct", group == "30-pct" ? 100 : 0); |
| 129 trial->AppendGroup("25-pct", group == "25-pct" ? 100 : 0); |
| 130 trial->AppendGroup("20-pct", group == "20-pct" ? 100 : 0); |
| 131 trial->AppendGroup("15-pct", group == "15-pct" ? 100 : 0); |
| 132 trial->AppendGroup("10-pct", group == "10-pct" ? 100 : 0); |
| 133 trial->AppendGroup("5-pct", group == "5-pct" ? 100 : 0); |
| 134 trial->AppendGroup("0-pct", group == "0-pct" ? 100 : 0); |
| 135 |
| 136 // We have to call group in order to mark the experiment as active. |
| 137 trial->group(); |
| 138 } |
| 139 |
94 } // namespace | 140 } // namespace |
95 | 141 |
96 void SetupDesktopFieldTrials(const CommandLine& parsed_command_line, | 142 void SetupDesktopFieldTrials(const CommandLine& parsed_command_line, |
97 const base::Time& install_time, | 143 const base::Time& install_time, |
98 PrefService* local_state) { | 144 PrefService* local_state) { |
99 prerender::ConfigurePrefetchAndPrerender(parsed_command_line); | 145 prerender::ConfigurePrefetchAndPrerender(parsed_command_line); |
100 AutoLaunchChromeFieldTrial(); | 146 AutoLaunchChromeFieldTrial(); |
101 gpu_util::InitializeCompositingFieldTrial(); | 147 gpu_util::InitializeCompositingFieldTrial(); |
102 OmniboxFieldTrial::ActivateStaticTrials(); | 148 OmniboxFieldTrial::ActivateStaticTrials(); |
103 SetupInfiniteCacheFieldTrial(); | 149 SetupInfiniteCacheFieldTrial(); |
104 DisableShowProfileSwitcherTrialIfNecessary(); | 150 DisableShowProfileSwitcherTrialIfNecessary(); |
105 SetupAppLauncherFieldTrial(local_state); | 151 SetupAppLauncherFieldTrial(local_state); |
106 SetupLowLatencyFlashAudioFieldTrial(); | 152 SetupLowLatencyFlashAudioFieldTrial(); |
| 153 SetupPreReadFieldTrial(); |
107 } | 154 } |
108 | 155 |
109 } // namespace chrome | 156 } // namespace chrome |
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