Add data reduction functionality to all platforms.

components/data_reduction_proxy/browser/data_reduction_proxy_metrics.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_METRICS_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_BROWSER_DATA_REDUCTION_PROXY_METRICS_H_
 
 #include "base/time/time.h"
 
 namespace net {
 class URLRequest;
 }
 
+class PrefService;
+
 namespace data_reduction_proxy {
 
 class DataReductionProxyStatisticsPrefs;
 
 enum DataReductionProxyRequestType {
   VIA_DATA_REDUCTION_PROXY,  // A request served by the data reduction proxy.
 
   // Below are reasons why a request is not served by the enabled data reduction
   // proxy. Off-the-record profile data is not counted in all cases.
   HTTPS,  // An https request.
@@ skipping 22 matching lines @@
     int original_content_length,
     bool with_data_reduction_proxy_enabled,
     DataReductionProxyRequestType request_type,
     base::Time now,
     DataReductionProxyStatisticsPrefs* prefs);
 
 // Records daily data savings statistics to prefs and reports data savings UMA.
 void UpdateContentLengthPrefs(
     int received_content_length,
     int original_content_length,
-    bool with_data_reduction_proxy_enabled,
+    PrefService* profile_prefs,
     DataReductionProxyRequestType request_type,
     DataReductionProxyStatisticsPrefs* prefs);
 
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_BROWSER_DATA_REDUCTION_PROXY_METRICS_H_