Adding DRP specfic UMA for FirstContentfulPaint

content/test/test_navigation_url_loader.h

Index: content/test/test_navigation_url_loader.h
diff --git a/content/test/test_navigation_url_loader.h b/content/test/test_navigation_url_loader.h
index 07cacb3d22415a6c5c7fdbf3afc3631a747b6d84..8edcdfc7aac20b99895def177b61545cc274b43a 100644
--- a/content/test/test_navigation_url_loader.h
+++ b/content/test/test_navigation_url_loader.h
@@ -11,20 +11,21 @@
 #include "content/browser/frame_host/navigation_request_info.h"
 #include "content/browser/loader/navigation_url_loader.h"
 #include "content/common/navigation_params.h"
 
 namespace net {
 struct RedirectInfo;
 }
 
 namespace content {
 
+class NavigationData;
 class NavigationURLLoaderDelegate;
 class StreamHandle;
 struct ResourceResponse;
 
 // PlzNavigate
 // Test implementation of NavigationURLLoader to simulate the network stack
 // response.
 class TestNavigationURLLoader
     : public NavigationURLLoader,
       public base::SupportsWeakPtr<TestNavigationURLLoader> {
@@ -38,21 +39,22 @@ class TestNavigationURLLoader
 
   NavigationRequestInfo* request_info() const { return request_info_.get(); }
 
   void SimulateServerRedirect(const GURL& redirect_url);
 
   void SimulateError(int error_code);
 
   void CallOnRequestRedirected(const net::RedirectInfo& redirect_info,
                                const scoped_refptr<ResourceResponse>& response);
   void CallOnResponseStarted(const scoped_refptr<ResourceResponse>& response,
-                             std::unique_ptr<StreamHandle> body);
+                             std::unique_ptr<StreamHandle> body,
+                             std::unique_ptr<NavigationData> navigation_data);
 
   int redirect_count() { return redirect_count_; }
 
   bool response_proceeded() { return response_proceeded_; }
 
  private:
   ~TestNavigationURLLoader() override;
 
   std::unique_ptr<NavigationRequestInfo> request_info_;
   NavigationURLLoaderDelegate* delegate_;