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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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/net/async_dns_field_trial.h" | 5 #include "chrome/browser/net/async_dns_field_trial.h" |
6 | 6 |
7 #include "base/metrics/field_trial.h" | 7 #include "base/metrics/field_trial.h" |
| 8 #include "base/string_util.h" |
8 #include "build/build_config.h" | 9 #include "build/build_config.h" |
9 #include "chrome/common/chrome_version_info.h" | |
10 | 10 |
11 namespace chrome_browser_net { | 11 namespace chrome_browser_net { |
12 | 12 |
13 bool ConfigureAsyncDnsFieldTrial() { | 13 bool ConfigureAsyncDnsFieldTrial() { |
14 #if defined(OS_ANDROID) || defined(OS_IOS) | 14 #if defined(OS_ANDROID) || defined(OS_IOS) |
15 // There is no DnsConfigService on those platforms so disable the field trial. | 15 // There is no DnsConfigService on those platforms so disable the field trial. |
16 return false; | 16 return false; |
17 #endif | 17 #endif |
18 const base::FieldTrial::Probability kAsyncDnsDivisor = 100; | 18 // Match both "AsyncDnsA" and "AsyncDnsB" groups. |
19 base::FieldTrial::Probability enabled_probability = 0; | 19 return StartsWithASCII(base::FieldTrialList::FindFullName("AsyncDns"), |
20 | 20 "AsyncDns", false /* case_sensitive */); |
21 if (chrome::VersionInfo::GetChannel() <= chrome::VersionInfo::CHANNEL_DEV) | |
22 enabled_probability = 50; | |
23 | |
24 scoped_refptr<base::FieldTrial> trial( | |
25 base::FieldTrialList::FactoryGetFieldTrial( | |
26 "AsyncDns", kAsyncDnsDivisor, "disabled", 2012, 10, 30, NULL)); | |
27 | |
28 int enabled_group = trial->AppendGroup("enabled", enabled_probability); | |
29 return trial->group() == enabled_group; | |
30 } | 21 } |
31 | 22 |
32 } // namespace chrome_browser_net | 23 } // namespace chrome_browser_net |
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