Shutdown RenderWidgetHost owned by RenderFrameHost when destroying the RenderFrameHost.

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 2012 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/renderer_host/render_widget_host_impl.h"
 
 #include <math.h>
 #include <set>
 #include <utility>
 
@@ skipping 1318 matching lines @@
 }
 
 void RenderWidgetHostImpl::SetAutoResize(bool enable,
                                          const gfx::Size& min_size,
                                          const gfx::Size& max_size) {
   auto_resize_enabled_ = enable;
   min_size_for_auto_resize_ = min_size;
   max_size_for_auto_resize_ = max_size;
 }
 
-void RenderWidgetHostImpl::Cleanup() {
-  if (view_) {
-    view_->Destroy();
-    view_ = nullptr;
-  }
-}
-
 void RenderWidgetHostImpl::Destroy() {
   NotificationService::current()->Notify(
       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
       Source<RenderWidgetHost>(this),
       NotificationService::NoDetails());
 
   // Tell the view to die.
   // Note that in the process of the view shutting down, it can call a ton
   // of other messages on us.  So if you do any other deinitialization here,
   // do it after this call to view_->Destroy().
@@ skipping 770 matching lines @@
 }
 #endif
 
 SkColorType RenderWidgetHostImpl::PreferredReadbackFormat() {
   if (view_)
     return view_->PreferredReadbackFormat();
   return kN32_SkColorType;
 }
 
 }  // namespace content