Add data reduction functionality to all platforms.

net/proxy/proxy_service.h

 // 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.
 
 #ifndef NET_PROXY_PROXY_SERVICE_H_
 #define NET_PROXY_PROXY_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 199 matching lines @@
   // Clears the list of bad proxy servers that has been cached.
   void ClearBadProxiesCache() {
     proxy_retry_info_.clear();
   }
 
   // Forces refetching the proxy configuration, and applying it.
   // This re-does everything from fetching the system configuration,
   // to downloading and testing the PAC files.
   void ForceReloadProxyConfig();
 
+  // Sets URLs for data reduction proxy.
+  void SetDataReductionProxyOrigins(
+      const GURL& data_reduction_default_origin,
+      const GURL& data_reduction_default_fallback_origin);

[Ryan Sleevi, 2014/07/22 01:56:31]

Sorry, this is a layering violation.

[bengr, 2014/07/22 18:55:00]

I agree. Would you be ok with introducing a ProxyService delegate?

+
   // Same as CreateProxyServiceUsingV8ProxyResolver, except it uses system
   // libraries for evaluating the PAC script if available, otherwise skips
   // proxy autoconfig.
   static ProxyService* CreateUsingSystemProxyResolver(
       ProxyConfigService* proxy_config_service,
       size_t num_pac_threads,
       NetLog* net_log);
 
   // Creates a ProxyService without support for proxy autoconfig.
   static ProxyService* CreateWithoutProxyResolver(
@@ skipping 247 matching lines @@
   // The earliest time at which we should run any proxy auto-config. (Used to
   // stall re-configuration following an IP address change).
   base::TimeTicks stall_proxy_autoconfig_until_;
 
   // The amount of time to stall requests following IP address changes.
   base::TimeDelta stall_proxy_auto_config_delay_;
 
   // Whether child ProxyScriptDeciders should use QuickCheck
   bool quick_check_enabled_;
 
+  // HostPortPair for data reduction proxy origin and fallback origin.
+  net::HostPortPair data_reduction_default_origin_;
+  net::HostPortPair data_reduction_default_fallback_origin_;
+
   DISALLOW_COPY_AND_ASSIGN(ProxyService);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SERVICE_H_