Add UMA histograms to MHTML save operations.

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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/render_frame_host_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 2064 matching lines @@
     frame_tree_node_->DidStopLoading();
 }
 
 void RenderFrameHostImpl::OnDidChangeLoadProgress(double load_progress) {
   frame_tree_node_->DidChangeLoadProgress(load_progress);
 }
 
 void RenderFrameHostImpl::OnSerializeAsMHTMLResponse(
     int job_id,
     bool success,
-    const std::set<std::string>& digests_of_uris_of_serialized_resources) {
+    const std::set<std::string>& digests_of_uris_of_serialized_resources,
+    base::TimeDelta renderer_main_thread_time) {
   MHTMLGenerationManager::GetInstance()->OnSerializeAsMHTMLResponse(
-      this, job_id, success, digests_of_uris_of_serialized_resources);
+      this, job_id, success, digests_of_uris_of_serialized_resources,
+      renderer_main_thread_time);
 }
 
 #if defined(USE_EXTERNAL_POPUP_MENU)
 void RenderFrameHostImpl::OnShowPopup(
     const FrameHostMsg_ShowPopup_Params& params) {
   RenderViewHostDelegateView* view =
       render_view_host_->delegate_->GetDelegateView();
   if (view) {
     gfx::Point original_point(params.bounds.x(), params.bounds.y());
     gfx::Point transformed_point =
@@ skipping 1001 matching lines @@
   web_bluetooth_service_->SetClientConnectionErrorHandler(base::Bind(
       &RenderFrameHostImpl::DeleteWebBluetoothService, base::Unretained(this)));
   return web_bluetooth_service_.get();
 }
 
 void RenderFrameHostImpl::DeleteWebBluetoothService() {
   web_bluetooth_service_.reset();
 }
 
 }  // namespace content