| // Copyright (c) 2012 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/net/async_dns_field_trial.h" |
| |
| #include "base/metrics/field_trial.h" |
| #include "base/strings/string_util.h" |
| #include "build/build_config.h" |
| |
| namespace chrome_browser_net { |
| |
| bool ConfigureAsyncDnsFieldTrial() { |
| #if defined(OS_ANDROID) || defined(OS_IOS) |
| // There is no DnsConfigService on those platforms so disable the field trial. |
| return false; |
| #endif |
| |
| #if defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_MACOSX) |
| const bool kDefault = true; |
| #else |
| const bool kDefault = false; |
| #endif |
| |
| // Configure the AsyncDns field trial as follows: |
| // groups AsyncDnsA and AsyncDnsB: return true, |
| // groups SystemDnsA and SystemDnsB: return false, |
| // otherwise (trial absent): return default. |
| std::string group_name = base::FieldTrialList::FindFullName("AsyncDns"); |
| if (!group_name.empty()) |
| return StartsWithASCII(group_name, "AsyncDns", false /* case_sensitive */); |
| return kDefault; |
| } |
| |
| } // namespace chrome_browser_net |