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 cb40ca14da46daced7ec040515c5a983ead7a70f..e0bbf360a05dac46716608139602ecdb040393cb 100644
--- a/content/public/browser/resource_dispatcher_host_delegate.h
+++ b/content/public/browser/resource_dispatcher_host_delegate.h
@@ -22,20 +22,21 @@ class Sender;
 }
 
 namespace net {
 class AuthChallengeInfo;
 class URLRequest;
 }
 
 namespace content {
 
 class AppCacheService;
+class NavigationData;
 class ResourceContext;
 class ResourceDispatcherHostLoginDelegate;
 class ResourceThrottle;
 struct Referrer;
 struct ResourceResponse;
 struct StreamInfo;
 
 // Interface that the embedder provides to ResourceDispatcherHost to allow
 // observing and modifying requests.
 class CONTENT_EXPORT ResourceDispatcherHostDelegate {
@@ -123,18 +124,23 @@ 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);
 
+  // Asks the embedder for NavigationData related to this request. It is only
+  // called for requests that are navigation requests.
+  virtual std::unique_ptr<NavigationData> GetNavigationData(
+      net::URLRequest* request) const;
+
  protected:
   ResourceDispatcherHostDelegate();
   virtual ~ResourceDispatcherHostDelegate();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RESOURCE_DISPATCHER_HOST_DELEGATE_H_