Implement automatic load of composed/embedded automation trees

content/browser/web_contents/web_contents_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/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 602 matching lines @@
       view_->SetOverscrollControllerEnabled(CanOverscrollContent());
   }
 }
 
 RenderProcessHost* WebContentsImpl::GetRenderProcessHost() const {
   RenderViewHostImpl* host = GetRenderManager()->current_host();
   return host ? host->GetProcess() : NULL;
 }
 
 RenderFrameHost* WebContentsImpl::GetMainFrame() {
+
   return frame_tree_.root()->current_frame_host();
 }
 
 RenderFrameHost* WebContentsImpl::GetFocusedFrame() {
   if (!frame_tree_.GetFocusedFrame())
     return NULL;
   return frame_tree_.GetFocusedFrame()->current_frame_host();
 }
 
 void WebContentsImpl::ForEachFrame(
@@ skipping 3685 matching lines @@
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content