Move out DidStartProvisionalLoad from WebContentsImpl into Navigator.

content/test/test_render_frame_host.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/test/test_render_frame_host.h"
 
 namespace content {
 
 TestRenderFrameHost::TestRenderFrameHost(RenderViewHostImpl* render_view_host,
                                          RenderFrameHostDelegate* delegate,
                                          FrameTree* frame_tree,
+                                         FrameTreeNode* frame_tree_node,
                                          int routing_id,
                                          bool is_swapped_out)
     : RenderFrameHostImpl(render_view_host,
                           delegate,
                           frame_tree,
+                          frame_tree_node,
                           routing_id,
                           is_swapped_out) {}
 
 TestRenderFrameHost::~TestRenderFrameHost() {}
 
 }  // namespace content