Add client type in chrome-proxy header for desktop.

chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc

Index: chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc
diff --git a/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc b/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc
index 3e7ae08e1870a97f1b2e7e116ad0393516fe71dc..c1bbc11a7b0286e91b6b170045c1f55e80584a60 100644
--- a/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc
+++ b/chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc
@@ -17,6 +17,7 @@
 #include "components/data_reduction_proxy/browser/data_reduction_proxy_settings.h"
 #include "net/url_request/url_request_context_getter.h"
 
+using data_reduction_proxy::Client;
 using data_reduction_proxy::DataReductionProxyParams;
 using data_reduction_proxy::DataReductionProxySettings;
 
@@ -51,12 +52,28 @@ void DataReductionProxyChromeSettings::RegisterSyntheticFieldTrial(
 }
 
 // static
-std::string DataReductionProxyChromeSettings::GetClient() {
+Client DataReductionProxyChromeSettings::GetClient() {
 #if defined(OS_ANDROID)
-  return data_reduction_proxy::kClientChromeAndroid;
+  return Client::CHROME_ANDROID;
 #elif defined(OS_IOS)
-  return data_reduction_proxy::kClientChromeIOS;
+  return Client::CHROME_IOS;
+#elif defined(OS_MACOSX)
+  return Client::CHROME_MAC;
+#elif defined(OS_CHROMEOS)
+  return Client::CHROME_CHROMEOS;
+#elif defined(OS_LINUX)
+  return Client::CHROME_LINUX;
+#elif defined(OS_WIN)
+  return Client::CHROME_WINDOWS;
+#elif defined(OS_FREEBSD)
+  return Client::CHROME_FREEBSD;
+#elif defined(OS_OPENBSD)
+  return Client::CHROME_OPENBSD;
+#elif defined(OS_SOLARIS)
+  return Client::CHROME_SOLARIS;
+#elif defined(OS_QNX)
+  return Client::CHROME_QNX;
 #else
-  return "";
+  return Client::UNKNOWN;
 #endif
 }