Almost finish moving context_menu_node_ from RenderViewImpl to RenderFrameImpl.

content/browser/frame_host/frame_tree.h

Index: content/browser/frame_host/frame_tree.h
===================================================================
--- content/browser/frame_host/frame_tree.h	(revision 255719)
+++ content/browser/frame_host/frame_tree.h	(working copy)
@@ -88,6 +88,12 @@
   // Convenience accessor for the main frame's RenderFrameHostImpl.
   RenderFrameHostImpl* GetMainFrame() const;
 
+  // Returns the focused frame.
+  FrameTreeNode* GetFocusedFrame();
+
+  // Sets the focused frame.
+  void SetFocusedFrame(FrameTreeNode* node);
+
   // Allows a client to listen for frame removal.  The listener should expect
   // to receive the RenderViewHostImpl containing the frame and the renderer-
   // specific frame routing ID of the removed frame.
@@ -145,6 +151,8 @@
 
   scoped_ptr<FrameTreeNode> root_;
 
+  int64 focused_frame_tree_node_id_;
+
   base::Callback<void(RenderViewHostImpl*, int)> on_frame_removed_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameTree);