Add client type in chrome-proxy header for desktop.

chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc

 // 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.
 
 #include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/metrics/chrome_metrics_service_accessor.h"
@@ skipping 38 matching lines @@
       "DataReductionProxyEnabled",
       data_reduction_proxy_enabled ? "true" : "false");
 }
 
 // static
 std::string DataReductionProxyChromeSettings::GetClient() {
 #if defined(OS_ANDROID)
   return data_reduction_proxy::kClientChromeAndroid;
 #elif defined(OS_IOS)
   return data_reduction_proxy::kClientChromeIOS;
+#elif defined(OS_MACOSX)
+  return data_reduction_proxy::kClientMac;
+#elif defined(OS_LINUX)
+  return data_reduction_proxy::kClientLinux;
+#elif defined(OS_WIN)
+  return data_reduction_proxy::kClientWin;
+#elif defined(OS_FREEBSD)
+  return data_reduction_proxy::kClientFreeBsd;
+#elif defined(OS_OPENBSD)
+  return data_reduction_proxy::kClientOpenBsd;
+#elif defined(OS_SOLARIS)
+  return data_reduction_proxy::kClientSolaris;
+#elif defined(OS_QNX)
+  return data_reduction_proxy::kClientQnx;
 #else
   return "";
 #endif
 }