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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
// Copyright (c) 2011 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/instant/instant_field_trial.h"
#include "base/command_line.h"
#include "base/metrics/field_trial.h"
#include "chrome/browser/metrics/metrics_service.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/pref_names.h"
namespace {
// Field trial IDs of the control and experiment groups. Though they are not
// literally "const", they are set only once, in Activate() below. See the .h
// file for what these groups represent.
int g_instant_experiment_a = 0;
int g_instant_experiment_b = 0;
int g_hidden_experiment_a = 0;
int g_hidden_experiment_b = 0;
int g_silent_experiment_a = 0;
int g_silent_experiment_b = 0;
int g_suggest_experiment_a = 0;
int g_suggest_experiment_b = 0;
int g_uma_control_a = 0;
int g_uma_control_b = 0;
int g_all_control_a = 0;
int g_all_control_b = 0;
}
// static
void InstantFieldTrial::Activate() {
scoped_refptr<base::FieldTrial> trial(
new base::FieldTrial("Instant", 1000, "Inactive", 2012, 7, 1));
// Try to give the user a consistent experience, if possible.
if (base::FieldTrialList::IsOneTimeRandomizationEnabled())
trial->UseOneTimeRandomization();
g_instant_experiment_a = trial->AppendGroup("InstantExperimentA", 50);
g_instant_experiment_b = trial->AppendGroup("InstantExperimentB", 50);
g_hidden_experiment_a = trial->AppendGroup("HiddenExperimentA", 50);
g_hidden_experiment_b = trial->AppendGroup("HiddenExperimentB", 50);
g_silent_experiment_a = trial->AppendGroup("SilentExperimentA", 340);
g_silent_experiment_b = trial->AppendGroup("SilentExperimentB", 340);
g_suggest_experiment_a = trial->AppendGroup("SuggestExperimentA", 50);
g_suggest_experiment_b = trial->AppendGroup("SuggestExperimentB", 50);
g_uma_control_a = trial->AppendGroup("UmaControlA", 5);
g_uma_control_b = trial->AppendGroup("UmaControlB", 5);
g_all_control_a = trial->AppendGroup("AllControlA", 5);
g_all_control_b = trial->AppendGroup("AllControlB", 5);
}
// static
InstantFieldTrial::Group InstantFieldTrial::GetGroup(Profile* profile) {
CommandLine* command_line = CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kInstantFieldTrial)) {
std::string switch_value =
command_line->GetSwitchValueASCII(switches::kInstantFieldTrial);
if (switch_value == switches::kInstantFieldTrialInstant)
return INSTANT_EXPERIMENT_A;
else if (switch_value == switches::kInstantFieldTrialHidden)
return HIDDEN_EXPERIMENT_A;
else if (switch_value == switches::kInstantFieldTrialSilent)
return SILENT_EXPERIMENT_A;
else if (switch_value == switches::kInstantFieldTrialSuggest)
return SUGGEST_EXPERIMENT_A;
else
return INACTIVE;
}
const int group = base::FieldTrialList::FindValue("Instant");
if (group == base::FieldTrial::kNotFinalized ||
group == base::FieldTrial::kDefaultGroupNumber) {
return INACTIVE;
}
const PrefService* prefs = profile ? profile->GetPrefs() : NULL;
if (!prefs ||
prefs->GetBoolean(prefs::kInstantEnabledOnce) ||
prefs->IsManagedPreference(prefs::kInstantEnabled)) {
return INACTIVE;
}
// First, deal with the groups that don't require UMA opt-in.
if (group == g_silent_experiment_a)
return SILENT_EXPERIMENT_A;
if (group == g_silent_experiment_b)
return SILENT_EXPERIMENT_B;
if (group == g_all_control_a)
return ALL_CONTROL_A;
if (group == g_all_control_b)
return ALL_CONTROL_B;
// All other groups require UMA and suggest, else bounce back to INACTIVE.
if (profile->IsOffTheRecord() ||
!MetricsServiceHelper::IsMetricsReportingEnabled() ||
!prefs->GetBoolean(prefs::kSearchSuggestEnabled)) {
return INACTIVE;
}
if (group == g_instant_experiment_a)
return INSTANT_EXPERIMENT_A;
if (group == g_instant_experiment_b)
return INSTANT_EXPERIMENT_B;
if (group == g_hidden_experiment_a)
return HIDDEN_EXPERIMENT_A;
if (group == g_hidden_experiment_b)
return HIDDEN_EXPERIMENT_B;
if (group == g_suggest_experiment_a)
return SUGGEST_EXPERIMENT_A;
if (group == g_suggest_experiment_b)
return SUGGEST_EXPERIMENT_B;
if (group == g_uma_control_a)
return UMA_CONTROL_A;
if (group == g_uma_control_b)
return UMA_CONTROL_B;
NOTREACHED();
return INACTIVE;
}
// static
bool InstantFieldTrial::IsInstantExperiment(Profile* profile) {
Group group = GetGroup(profile);
return group == INSTANT_EXPERIMENT_A || group == INSTANT_EXPERIMENT_B ||
group == HIDDEN_EXPERIMENT_A || group == HIDDEN_EXPERIMENT_B ||
group == SILENT_EXPERIMENT_A || group == SILENT_EXPERIMENT_B ||
group == SUGGEST_EXPERIMENT_A || group == SUGGEST_EXPERIMENT_B;
}
// static
bool InstantFieldTrial::IsHiddenExperiment(Profile* profile) {
Group group = GetGroup(profile);
return group == HIDDEN_EXPERIMENT_A || group == HIDDEN_EXPERIMENT_B ||
group == SILENT_EXPERIMENT_A || group == SILENT_EXPERIMENT_B ||
group == SUGGEST_EXPERIMENT_A || group == SUGGEST_EXPERIMENT_B;
}
// static
bool InstantFieldTrial::IsSilentExperiment(Profile* profile) {
Group group = GetGroup(profile);
return group == SILENT_EXPERIMENT_A || group == SILENT_EXPERIMENT_B;
}
// static
std::string InstantFieldTrial::GetGroupName(Profile* profile) {
switch (GetGroup(profile)) {
case INACTIVE: return std::string();
case INSTANT_EXPERIMENT_A: return "_InstantExperimentA";
case INSTANT_EXPERIMENT_B: return "_InstantExperimentB";
case HIDDEN_EXPERIMENT_A: return "_HiddenExperimentA";
case HIDDEN_EXPERIMENT_B: return "_HiddenExperimentB";
case SILENT_EXPERIMENT_A: return "_SilentExperimentA";
case SILENT_EXPERIMENT_B: return "_SilentExperimentB";
case SUGGEST_EXPERIMENT_A: return "_SuggestExperimentA";
case SUGGEST_EXPERIMENT_B: return "_SuggestExperimentB";
case UMA_CONTROL_A: return "_UmaControlA";
case UMA_CONTROL_B: return "_UmaControlB";
case ALL_CONTROL_A: return "_AllControlA";
case ALL_CONTROL_B: return "_AllControlB";
}
NOTREACHED();
return std::string();
}
// static
std::string InstantFieldTrial::GetGroupAsUrlParam(Profile* profile) {
switch (GetGroup(profile)) {
case INACTIVE: return std::string();
case INSTANT_EXPERIMENT_A: return "ix=iea&";
case INSTANT_EXPERIMENT_B: return "ix=ieb&";
case HIDDEN_EXPERIMENT_A: return "ix=hea&";
case HIDDEN_EXPERIMENT_B: return "ix=heb&";
case SILENT_EXPERIMENT_A: return "ix=sea&";
case SILENT_EXPERIMENT_B: return "ix=seb&";
case SUGGEST_EXPERIMENT_A: return "ix=tea&";
case SUGGEST_EXPERIMENT_B: return "ix=teb&";
case UMA_CONTROL_A: return "ix=uca&";
case UMA_CONTROL_B: return "ix=ucb&";
case ALL_CONTROL_A: return "ix=aca&";
case ALL_CONTROL_B: return "ix=acb&";
}
NOTREACHED();
return std::string();
}
// static
bool InstantFieldTrial::ShouldSetSuggestedText(Profile* profile) {
Group group = GetGroup(profile);
return !(group == HIDDEN_EXPERIMENT_A || group == HIDDEN_EXPERIMENT_B ||
group == SILENT_EXPERIMENT_A || group == SILENT_EXPERIMENT_B);
}
|
