Adding DRP specfic UMA for FirstContentfulPaint

content/public/browser/resource_dispatcher_host_delegate.h

Index: content/public/browser/resource_dispatcher_host_delegate.h
diff --git a/content/public/browser/resource_dispatcher_host_delegate.h b/content/public/browser/resource_dispatcher_host_delegate.h
index ad6e2c5e981c26511c1c175be099af22054cfed0..693b010e5ba6e18e7ed45dd2a357d202f3b16ecc 100644
--- a/content/public/browser/resource_dispatcher_host_delegate.h
+++ b/content/public/browser/resource_dispatcher_host_delegate.h
@@ -17,20 +17,21 @@
 class GURL;
 template <class T> class ScopedVector;
 
 namespace IPC {
 class Sender;
 }
 
 namespace net {
 class AuthChallengeInfo;
 class URLRequest;
+class HostPortPair;
 }
 
 namespace content {
 
 class AppCacheService;
 class ResourceContext;
 class ResourceDispatcherHostLoginDelegate;
 class ResourceThrottle;
 struct Referrer;
 struct ResourceResponse;
@@ -123,18 +124,22 @@ class CONTENT_EXPORT ResourceDispatcherHostDelegate {
                                    ResourceResponse* response);
 
   // Notification that a request has completed.
   virtual void RequestComplete(net::URLRequest* url_request);
 
   // Asks the embedder if Lo-Fi mode should be enabled for the given request. It
   // is only called for requests with an unspecified Lo-Fi value.
   virtual bool ShouldEnableLoFiMode(const net::URLRequest& url_request,
                                     content::ResourceContext* resource_context);
 
+  virtual bool WasFetchedViaDataReductionProxy(
+      const net::HostPortPair& proxy_server,
+      ResourceContext* resource_context);
+
  protected:
   ResourceDispatcherHostDelegate();
   virtual ~ResourceDispatcherHostDelegate();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RESOURCE_DISPATCHER_HOST_DELEGATE_H_