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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chrome/browser/net/async_dns_field_trial.h" |
| 6 |
| 7 #include "base/metrics/field_trial.h" |
| 8 #include "build/build_config.h" |
| 9 #include "chrome/common/chrome_version_info.h" |
| 10 |
| 11 namespace chrome_browser_net { |
| 12 |
| 13 bool ConfigureAsyncDnsFieldTrial() { |
| 14 #if defined(OS_ANDROID) || defined(OS_IOS) || defined(OS_CHROMEOS) |
| 15 // There is no DnsConfigService on those platforms so disable the field trial. |
| 16 return false; |
| 17 #endif |
| 18 const base::FieldTrial::Probability kAsyncDnsDivisor = 100; |
| 19 base::FieldTrial::Probability enabled_probability = 0; |
| 20 |
| 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, 9, 30, NULL)); |
| 27 |
| 28 int enabled_group = trial->AppendGroup("enabled", enabled_probability); |
| 29 return trial->group() == enabled_group; |
| 30 } |
| 31 |
| 32 } // namespace chrome_browser_net |
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