Move out DidStartProvisionalLoad from WebContentsImpl into Navigator.

content/browser/frame_host/frame_tree_node.h

Index: content/browser/frame_host/frame_tree_node.h
diff --git a/content/browser/frame_host/frame_tree_node.h b/content/browser/frame_host/frame_tree_node.h
index a110ff9aab557b4155a3781c7374748293dc4373..488609897e5421d56db5fef2d69fc81813818979 100644
--- a/content/browser/frame_host/frame_tree_node.h
+++ b/content/browser/frame_host/frame_tree_node.h
@@ -11,6 +11,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
+#include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/frame_host/render_view_host_manager.h"
 #include "content/common/content_export.h"
 #include "url/gurl.h"
@@ -33,14 +34,22 @@ class CONTENT_EXPORT FrameTreeNode {
                 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);
 
   ~FrameTreeNode();
 
   void AddChild(scoped_ptr<FrameTreeNode> child);
   void RemoveChild(FrameTreeNode* child);
 
+  // TODO(nasko): This method should be removed once there is a
+  // RenderFrameHostManager for each node in the frame tree.
+  void set_render_frame_host(
+      RenderFrameHostImpl* render_frame_host,
+      bool owns_render_frame_host) {
+    render_frame_host_ = render_frame_host;
+    owns_render_frame_host_ = owns_render_frame_host;
+  }
+
   // Transitional API allowing the RenderFrameHost of a FrameTreeNode
   // representing the main frame to be provided by someone else. After
   // this is called, the FrameTreeNode no longer owns its RenderFrameHost.