Add client type in chrome-proxy header for desktop.

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 "base/memory/scoped_ptr.h"
+#include "components/data_reduction_proxy/browser/data_reduction_proxy_auth_request_handler.h"
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_settings.h"
 #include "components/keyed_service/core/keyed_service.h"
 
 namespace base {
 class PrefService;
 }
 
 namespace data_reduction_proxy {
 class DataReductionProxyConfigurator;
 class DataReductionProxyParams;
@@ skipping 21 matching lines @@
 
   // Initialize the settings object with the given configurator, prefs services,
   // and request context.
   void InitDataReductionProxySettings(
       data_reduction_proxy::DataReductionProxyConfigurator* configurator,
       PrefService* profile_prefs,
       PrefService* local_state_prefs,
       net::URLRequestContextGetter* request_context);
 
   // Gets the client type for the data reduction proxy.
-  static std::string GetClient();
+  static data_reduction_proxy::Client GetClient();
 
  private:
   // Registers the DataReductionProxyEnabled synthetic field trial with
   // the group |data_reduction_proxy_enabled|.
   void RegisterSyntheticFieldTrial(bool data_reduction_proxy_enabled);
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyChromeSettings);
 };
 
 #endif  // CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROXY_CHROME_SETTINGS_H_