Move out DidStartProvisionalLoad from WebContentsImpl into Navigator.

content/browser/frame_host/frame_tree_node.cc

Index: content/browser/frame_host/frame_tree_node.cc
diff --git a/content/browser/frame_host/frame_tree_node.cc b/content/browser/frame_host/frame_tree_node.cc
index ce357750443542d1ea3f4f1380313d6196b111e1..c1c244a1b7925c55a94a8683d41f94172fe9fdd3 100644
--- a/content/browser/frame_host/frame_tree_node.cc
+++ b/content/browser/frame_host/frame_tree_node.cc
@@ -20,8 +20,7 @@ FrameTreeNode::FrameTreeNode(Navigator* navigator,
                              RenderWidgetHostDelegate* render_widget_delegate,
                              RenderViewHostManager::Delegate* manager_delegate,
                              int64 frame_id,
-                             const std::string& name,
-                             scoped_ptr<RenderFrameHostImpl> render_frame_host)
+                             const std::string& name)
   : navigator_(navigator),
     render_manager_(render_view_delegate,
                     render_widget_delegate,
@@ -29,8 +28,7 @@ FrameTreeNode::FrameTreeNode(Navigator* navigator,
     frame_tree_node_id_(next_frame_tree_node_id_++),
     frame_id_(frame_id),
     frame_name_(name),
-    owns_render_frame_host_(true),
-    render_frame_host_(render_frame_host.release()) {
+    owns_render_frame_host_(true) {
 }
 
 FrameTreeNode::~FrameTreeNode() {