1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/chrome_browser_field_trials_desktop.h"
#include <string>
#include "base/command_line.h"
#include "base/environment.h"
#include "base/metrics/field_trial.h"
#include "base/prefs/pref_service.h"
#include "base/strings/string_util.h"
#include "chrome/browser/auto_launch_trial.h"
#include "chrome/browser/google/google_util.h"
#include "chrome/browser/omnibox/omnibox_field_trial.h"
#include "chrome/browser/prerender/prerender_field_trial.h"
#include "chrome/browser/profiles/profiles_state.h"
#include "chrome/browser/safe_browsing/safe_browsing_blocking_page.h"
#include "chrome/browser/ui/app_list/app_list_util.h"
#include "chrome/browser/ui/sync/one_click_signin_helper.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/chrome_version_info.h"
#include "chrome/common/metrics/variations/variations_util.h"
#include "chrome/common/pref_names.h"
#include "content/public/common/content_constants.h"
#include "net/spdy/spdy_session.h"
#include "ui/base/layout.h"
#if defined(OS_CHROMEOS)
#include "chrome/browser/chromeos/login/user_manager.h"
#endif
namespace chrome {
namespace {
void AutoLaunchChromeFieldTrial() {
std::string brand;
google_util::GetBrand(&brand);
// Create a 100% field trial based on the brand code.
if (auto_launch_trial::IsInExperimentGroup(brand)) {
base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
kAutoLaunchTrialAutoLaunchGroup);
} else if (auto_launch_trial::IsInControlGroup(brand)) {
base::FieldTrialList::CreateFieldTrial(kAutoLaunchTrialName,
kAutoLaunchTrialControlGroup);
}
}
void SetupInfiniteCacheFieldTrial() {
const base::FieldTrial::Probability kDivisor = 100;
base::FieldTrial::Probability infinite_cache_probability = 0;
scoped_refptr<base::FieldTrial> trial(
base::FieldTrialList::FactoryGetFieldTrial(
"InfiniteCache", kDivisor, "No", 2013, 12, 31,
base::FieldTrial::ONE_TIME_RANDOMIZED, NULL));
trial->AppendGroup("Yes", infinite_cache_probability);
trial->AppendGroup("Control", infinite_cache_probability);
}
void DisableShowProfileSwitcherTrialIfNecessary() {
// This trial is created by the VariationsService, but it needs to be disabled
// if multi-profiles isn't enabled.
base::FieldTrial* trial = base::FieldTrialList::Find("ShowProfileSwitcher");
if (trial && !profiles::IsMultipleProfilesEnabled())
trial->Disable();
}
void SetupPreReadFieldTrial() {
// The chrome executable will have set (or not) an environment variable with
// the group name into which this client belongs.
std::string group;
scoped_ptr<base::Environment> env(base::Environment::Create());
if (!env->GetVar(chrome::kPreReadEnvironmentVariable, &group) ||
group.empty()) {
return;
}
// Initialize the field trial. We declare all of the groups here (so that
// the dashboard creation tools can find them) but force the probability
// of being assigned to the group already chosen by the executable, if any,
// to 100%.
scoped_refptr<base::FieldTrial> trial(
base::FieldTrialList::FactoryGetFieldTrial(
"BrowserPreReadExperiment", 100, "100-pct-default",
2014, 7, 1, base::FieldTrial::SESSION_RANDOMIZED, NULL));
trial->AppendGroup("100-pct-control", group == "100-pct-control" ? 100 : 0);
trial->AppendGroup("95-pct", group == "95-pct" ? 100 : 0);
trial->AppendGroup("90-pct", group == "90-pct" ? 100 : 0);
trial->AppendGroup("85-pct", group == "85-pct" ? 100 : 0);
trial->AppendGroup("80-pct", group == "80-pct" ? 100 : 0);
trial->AppendGroup("75-pct", group == "75-pct" ? 100 : 0);
trial->AppendGroup("70-pct", group == "70-pct" ? 100 : 0);
trial->AppendGroup("65-pct", group == "65-pct" ? 100 : 0);
trial->AppendGroup("60-pct", group == "60-pct" ? 100 : 0);
trial->AppendGroup("55-pct", group == "55-pct" ? 100 : 0);
trial->AppendGroup("50-pct", group == "50-pct" ? 100 : 0);
trial->AppendGroup("45-pct", group == "45-pct" ? 100 : 0);
trial->AppendGroup("40-pct", group == "40-pct" ? 100 : 0);
trial->AppendGroup("35-pct", group == "35-pct" ? 100 : 0);
trial->AppendGroup("30-pct", group == "30-pct" ? 100 : 0);
trial->AppendGroup("25-pct", group == "25-pct" ? 100 : 0);
trial->AppendGroup("20-pct", group == "20-pct" ? 100 : 0);
trial->AppendGroup("15-pct", group == "15-pct" ? 100 : 0);
trial->AppendGroup("10-pct", group == "10-pct" ? 100 : 0);
trial->AppendGroup("5-pct", group == "5-pct" ? 100 : 0);
trial->AppendGroup("0-pct", group == "0-pct" ? 100 : 0);
// We have to call group in order to mark the experiment as active.
trial->group();
}
#if defined(OS_CHROMEOS)
void SetupChromeOSMultiProfilesAllowedTrial() {
const char kTrialName[] = "ChromeOSMultiProfilesAllowed";
if (chromeos::UserManager::IsMultipleProfilesAllowed())
base::FieldTrialList::CreateFieldTrial(kTrialName, "allowed")->group();
else
base::FieldTrialList::CreateFieldTrial(kTrialName, "not_allowed")->group();
}
#endif // defined(OS_CHROMEOS)
} // namespace
void SetupDesktopFieldTrials(const CommandLine& parsed_command_line,
const base::Time& install_time,
PrefService* local_state) {
prerender::ConfigurePrerender(parsed_command_line);
AutoLaunchChromeFieldTrial();
OmniboxFieldTrial::ActivateStaticTrials();
SetupInfiniteCacheFieldTrial();
DisableShowProfileSwitcherTrialIfNecessary();
SetupShowAppLauncherPromoFieldTrial(local_state);
SetupPreReadFieldTrial();
#if defined(OS_CHROMEOS)
SetupChromeOSMultiProfilesAllowedTrial();
#endif
}
} // namespace chrome
|
