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Unified Diff: chrome/browser/net/async_dns_field_trial.cc

Issue 10828373: [net] Add AsyncDns field trial. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: sync Created 8 years, 4 months ago
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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..58e4b0f9782a1b6b1c2fad7465da30ae2f79b6e6
--- /dev/null
+++ b/chrome/browser/net/async_dns_field_trial.cc
@@ -0,0 +1,32 @@
+// 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 chrome_browser_net {
+
+bool ConfigureAsyncDnsFieldTrial() {
+#if defined(OS_ANDROID) || defined(OS_IOS) || defined(OS_CHROMEOS)
+ // There is no DnsConfigService on those platforms so disable the field trial.
+ return false;
+#endif
+ const base::FieldTrial::Probability kAsyncDnsDivisor = 100;
+ base::FieldTrial::Probability enabled_probability = 0;
+
+ if (chrome::VersionInfo::GetChannel() <= chrome::VersionInfo::CHANNEL_DEV)
+ 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;
+}
+
+} // namespace chrome_browser_net
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