Adding synthetic field trial for DataReductionProxyEnabled

components/data_reduction_proxy/browser/data_reduction_proxy_settings.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_DATA_REDUCTION_PROXY_BROWSER_DATA_REDUCTION_PROXY_SETTINGS_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_BROWSER_DATA_REDUCTION_PROXY_SETTINGS_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_member.h"
 #include "base/threading/thread_checker.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_configurator.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_params.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_usage_stats.h"
 #include "net/base/net_util.h"
 #include "net/base/network_change_notifier.h"
@@ skipping 93 matching lines @@
   // a |UrlRequestContextGetter| for canary probes, and a proxy configurator.
   // The caller must ensure that all parameters remain alive for the lifetime of
   // the |DataReductionProxySettings| instance.
   // TODO(marq): Remove when iOS supports the new interface above.
   void InitDataReductionProxySettings(
       PrefService* prefs,
       PrefService* local_state_prefs,
       net::URLRequestContextGetter* url_request_context_getter,
       scoped_ptr<DataReductionProxyConfigurator> configurator);
 
+  // Sets the |on_data_reduction_proxy_enabled_| callback and runs to register
+  // the DataReductionProxyEnabled synthetic field trial.
+  void SetOnDataReductionEnabledCallback(
+      const base::Callback<void(bool)>& on_data_reduction_proxy_enabled);
+
   // Sets the logic the embedder uses to set the networking configuration that
   // causes traffic to be proxied.
   void SetProxyConfigurator(
       scoped_ptr<DataReductionProxyConfigurator> configurator);
 
   // Returns true if the proxy is enabled.
   bool IsDataReductionProxyEnabled();
 
   // Returns true if the alternative proxy is enabled.
   bool IsDataReductionProxyAlternativeEnabled() const;
@@ skipping 169 matching lines @@
   scoped_ptr<net::URLFetcher> warmup_fetcher_;
 
   BooleanPrefMember spdy_proxy_auth_enabled_;
   BooleanPrefMember data_reduction_proxy_alternative_enabled_;
 
   PrefService* prefs_;
   PrefService* local_state_prefs_;
 
   net::URLRequestContextGetter* url_request_context_getter_;
 
+  base::Callback<void(bool)> on_data_reduction_proxy_enabled_;
+
   scoped_ptr<DataReductionProxyConfigurator> configurator_;
 
   base::ThreadChecker thread_checker_;
 
   scoped_ptr<DataReductionProxyParams> params_;
   DataReductionProxyUsageStats* usage_stats_;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxySettings);
 };
 
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_BROWSER_DATA_REDUCTION_PROXY_SETTINGS_H_