PlzNavigate: support NavigationThrottle::WillProcessResponse

content/browser/frame_host/navigator.cc

 // Copyright 2014 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/navigator.h"
 
 #include "base/time/time.h"
 #include "content/common/resource_request_body.h"
 #include "content/public/browser/stream_handle.h"
 
@@ skipping 24 matching lines @@
   return base::TimeTicks::Now();
 }
 
 void Navigator::OnBeginNavigation(
     FrameTreeNode* frame_tree_node,
     const CommonNavigationParams& common_params,
     const BeginNavigationParams& begin_params,
     scoped_refptr<ResourceRequestBody> body) {
 }
 
-void Navigator::CommitNavigation(NavigationRequest* navigation_request,
-                                 ResourceResponse* response,
-                                 scoped_ptr<StreamHandle> body) {
-}
-
 }  // namespace content