Adding DRP specfic UMA for FirstContentfulPaint

content/browser/loader/navigation_url_loader_impl.cc

Index: content/browser/loader/navigation_url_loader_impl.cc
diff --git a/content/browser/loader/navigation_url_loader_impl.cc b/content/browser/loader/navigation_url_loader_impl.cc
index 8b4c670242e745d60b4bfac9dab279a4454052c3..bd0199c99e2efc3cca6547532c8ca6616a852d8f 100644
--- a/content/browser/loader/navigation_url_loader_impl.cc
+++ b/content/browser/loader/navigation_url_loader_impl.cc
@@ -8,20 +8,21 @@
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/trace_event/trace_event.h"
 #include "content/browser/frame_host/navigation_request_info.h"
 #include "content/browser/loader/navigation_url_loader_delegate.h"
 #include "content/browser/loader/navigation_url_loader_impl_core.h"
 #include "content/browser/service_worker/service_worker_navigation_handle.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/navigation_data.h"
 #include "content/public/browser/stream_handle.h"
 
 namespace content {
 
 NavigationURLLoaderImpl::NavigationURLLoaderImpl(
     BrowserContext* browser_context,
     std::unique_ptr<NavigationRequestInfo> request_info,
     ServiceWorkerNavigationHandle* service_worker_handle,
     NavigationURLLoaderDelegate* delegate)
     : delegate_(delegate), weak_factory_(this) {
@@ -74,24 +75,26 @@ void NavigationURLLoaderImpl::ProceedWithResponse() {
 void NavigationURLLoaderImpl::NotifyRequestRedirected(
     const net::RedirectInfo& redirect_info,
     const scoped_refptr<ResourceResponse>& response) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   delegate_->OnRequestRedirected(redirect_info, response);
 }
 
 void NavigationURLLoaderImpl::NotifyResponseStarted(
     const scoped_refptr<ResourceResponse>& response,
-    std::unique_ptr<StreamHandle> body) {
+    std::unique_ptr<StreamHandle> body,
+    std::unique_ptr<NavigationData> navigation_data) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
-  delegate_->OnResponseStarted(response, std::move(body));
+  delegate_->OnResponseStarted(response, std::move(body),
+                               std::move(navigation_data));
 }
 
 void NavigationURLLoaderImpl::NotifyRequestFailed(bool in_cache,
                                                   int net_error) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   delegate_->OnRequestFailed(in_cache, net_error);
 }
 
 void NavigationURLLoaderImpl::NotifyRequestStarted(base::TimeTicks timestamp) {