blob: 7fb1896e289e12e5dab86fa6f9d774dcff6e60ed (
plain)
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
|
// 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_mobile.h"
#include <string>
#include "base/command_line.h"
#include "base/metrics/field_trial.h"
#include "base/prefs/pref_service.h"
#include "chrome/common/chrome_version_info.h"
namespace chrome {
namespace {
// Governs the rollout of the compression proxy for Chrome on mobile platforms.
// Always enabled in DEV and BETA versions.
// Stable percentage will be controlled from server.
void DataCompressionProxyFieldTrial() {
const char kDataCompressionProxyFieldTrialName[] =
"DataCompressionProxyRollout";
const base::FieldTrial::Probability kDataCompressionProxyDivisor = 1000;
// 10/1000 = 1% for starters.
const base::FieldTrial::Probability kDataCompressionProxyStable = 10;
const char kEnabled[] = "Enabled";
const char kDisabled[] = "Disabled";
// Find out if this is a stable channel.
const bool kIsStableChannel =
chrome::VersionInfo::GetChannel() == chrome::VersionInfo::CHANNEL_STABLE;
// Experiment enabled until Jan 1, 2015. By default, disabled.
scoped_refptr<base::FieldTrial> trial(
base::FieldTrialList::FactoryGetFieldTrial(
kDataCompressionProxyFieldTrialName, kDataCompressionProxyDivisor,
kDisabled, 2015, 1, 1, NULL));
// We want our trial results to be persistent.
trial->UseOneTimeRandomization();
// Non-stable channels will run with probability 1.
const int kEnabledGroup = trial->AppendGroup(
kEnabled,
kIsStableChannel ?
kDataCompressionProxyStable : kDataCompressionProxyDivisor);
const int v = trial->group();
VLOG(1) << "DataCompression proxy enabled group id: " << kEnabledGroup
<< ". Selected group id: " << v;
}
} // namespace
void SetupMobileFieldTrials(const CommandLine& parsed_command_line,
const base::Time& install_time,
PrefService* local_state) {
DataCompressionProxyFieldTrial();
}
} // namespace chrome
|
