Add RenderFrameHostDelegate and plumb it through all the necessary classes.

content/browser/frame_host/frame_tree.h

Index: content/browser/frame_host/frame_tree.h
===================================================================
--- content/browser/frame_host/frame_tree.h	(revision 238504)
+++ content/browser/frame_host/frame_tree.h	(working copy)
@@ -16,6 +16,7 @@
 
 class FrameTreeNode;
 class Navigator;
+class RenderFrameHostDelegate;
 class RenderProcessHost;
 class RenderViewHostDelegate;
 class RenderViewHostImpl;
@@ -46,6 +47,7 @@
   // TODO(creis): This set of delegates will change as we move things to
   // Navigator.
   FrameTree(Navigator* navigator,
+            RenderFrameHostDelegate* render_frame_delegate,
             RenderViewHostDelegate* render_view_delegate,
             RenderWidgetHostDelegate* render_widget_delegate,
             RenderFrameHostManager::Delegate* manager_delegate);
@@ -118,6 +120,7 @@
 
   // These delegates are installed into all the RenderViewHosts and
   // RenderFrameHosts that we create.
+  RenderFrameHostDelegate* render_frame_delegate_;
   RenderViewHostDelegate* render_view_delegate_;
   RenderWidgetHostDelegate* render_widget_delegate_;
   RenderFrameHostManager::Delegate* manager_delegate_;