Index: chrome/browser/net/async_dns_field_trial.cc |
diff --git a/chrome/browser/net/async_dns_field_trial.cc b/chrome/browser/net/async_dns_field_trial.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..c5cd0777018596c9038c81240a60c63b3a60ecad |
--- /dev/null |
+++ b/chrome/browser/net/async_dns_field_trial.cc |
@@ -0,0 +1,36 @@ |
+// 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 "build/build_config.h" |
+#include "chrome/common/chrome_version_info.h" |
+ |
+namespace net { |
+ |
+bool ConfigureAsyncDnsFieldTrial() { |
+#if defined(OS_ANDROID) || defined(OS_IOS) |
cbentzel
2012/08/22 17:16:55
CrOS as well?
|
+ // There is no DnsConfigService on those platforms so disable the field trial. |
+ return false; |
+#else |
cbentzel
2012/08/22 17:16:55
I would just do a #endif here rather than an else.
|
+ const base::FieldTrial::Probability kAsyncDnsDivisor = 100; |
+ base::FieldTrial::Probability enabled_probability = 0; |
+ |
+ chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel(); |
+ if (channel == chrome::VersionInfo::CHANNEL_DEV || |
+ channel == chrome::VersionInfo::CHANNEL_CANARY) { |
szym
2012/08/21 20:09:40
Should this be |channel <= CHANNEL_DEV| to allow T
cbentzel
2012/08/22 17:16:55
Fine with this.
|
+ enabled_probability = 50; |
+ } |
+ |
+ scoped_refptr<base::FieldTrial> trial( |
+ base::FieldTrialList::FactoryGetFieldTrial( |
+ "AsyncDns", kAsyncDnsDivisor, "disabled", 2012, 9, 30, NULL)); |
+ |
+ int enabled_group = trial->AppendGroup("enabled", enabled_probability); |
+ return trial->group() == enabled_group; |
+#endif |
+} |
+ |
+} // namespace net |