Adding DRP specfic UMA for FirstContentfulPaint

content/browser/frame_host/navigation_handle_impl.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/navigation_handle_impl.h"
 
 #include <utility>
 
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/navigator.h"
@@ skipping 250 matching lines @@
   WillRedirectRequest(new_url, new_method_is_post ? "POST" : "GET",
                       new_referrer_url, new_is_external_protocol,
                       scoped_refptr<net::HttpResponseHeaders>(),
                       base::Bind(&UpdateThrottleCheckResult, &result));
 
   // Reset the callback to ensure it will not be called later.
   complete_callback_.Reset();
   return result;
 }
 
+NavigationData* NavigationHandleImpl::GetNavigationData() {
+  return navigation_data_.get();
+}
+
 void NavigationHandleImpl::InitServiceWorkerHandle(
     ServiceWorkerContextWrapper* service_worker_context) {
   DCHECK(IsBrowserSideNavigationEnabled());
   service_worker_handle_.reset(
       new ServiceWorkerNavigationHandle(service_worker_context));
 }
 
 void NavigationHandleImpl::WillStartRequest(
     const std::string& method,
     const Referrer& sanitized_referrer,
@@ skipping 212 matching lines @@
   complete_callback_.Reset();
 
   if (!callback.is_null())
     callback.Run(result);
 
   // No code after running the callback, as it might have resulted in our
   // destruction.
 }
 
 }  // namespace content