Correcting the version field in the Chrome-Proxy header to be the chromium build and patch number.

chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_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 CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_CHROME_SETTINGS_H_
 #define CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_CHROME_SETTINGS_H_
 
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_settings.h"
 #include "components/keyed_service/core/keyed_service.h"
 
@@ skipping 14 matching lines @@
   explicit DataReductionProxyChromeSettings(
       data_reduction_proxy::DataReductionProxyParams* params);
 
   // Destructs the settings object.
   virtual ~DataReductionProxyChromeSettings();
 
   // Initialize the settings object with the given profile, which it uses to
   // get the appropriate pref service.
   virtual void InitDataReductionProxySettings(Profile* profile);
 
+  // Takes the Chrome version number and returns the build and patch portion
+  // of the string delimited by a period.
+  static std::string GetBuildAndPatchNumber(const std::string& version);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyChromeSettings);
 };
 
 #endif  // CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_CHROME_SETTINGS_H_