Give the main frame a RenderWidget.

content/browser/frame_host/frame_tree_node.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/frame_tree_node.h"
 
 #include <queue>
 
 #include "base/command_line.h"
 #include "base/profiler/scoped_tracker.h"
@@ skipping 113 matching lines @@
 void FrameTreeNode::AddChild(scoped_ptr<FrameTreeNode> child,
                              int process_id,
                              int frame_routing_id) {
   // Child frame must always be created in the same process as the parent.
   CHECK_EQ(process_id, render_manager_.current_host()->GetProcess()->GetID());
 
   // Initialize the RenderFrameHost for the new node.  We always create child
   // frames in the same SiteInstance as the current frame, and they can swap to
   // a different one if they navigate away.
   child->render_manager()->Init(
-      render_manager_.current_host()->GetSiteInstance()->GetBrowserContext(),
       render_manager_.current_host()->GetSiteInstance(),
       render_manager_.current_host()->GetRoutingID(), frame_routing_id,
       MSG_ROUTING_NONE, 0 /* surface_id */);
   child->set_parent(this);
 
   // Other renderer processes in this BrowsingInstance may need to find out
   // about the new frame.  Create a proxy for the child frame in all
   // SiteInstances that have a proxy for the frame's parent, since all frames
   // in a frame tree should have the same set of proxies.
   // TODO(alexmos, nick): We ought to do this for non-oopif too, for openers.
@@ skipping 233 matching lines @@
   // TODO(nasko): see if child frames should send IPCs in site-per-process
   // mode.
   if (!IsMainFrame())
     return true;
 
   render_manager_.Stop();
   return true;
 }
 
 }  // namespace content