InstantExtended: Remove overlay control code.

chrome/browser/tab_contents/render_view_context_menu.h

Index: chrome/browser/tab_contents/render_view_context_menu.h
diff --git a/chrome/browser/tab_contents/render_view_context_menu.h b/chrome/browser/tab_contents/render_view_context_menu.h
index a1179a26569addb331e626564451b8ce0a9894c1..6f2d0b4474a4b017c4686b8879080d1053e10236 100644
--- a/chrome/browser/tab_contents/render_view_context_menu.h
+++ b/chrome/browser/tab_contents/render_view_context_menu.h
@@ -22,7 +22,6 @@
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/base/window_open_disposition.h"
 
-class InstantExtendedContextMenuObserver;
 class PrintPreviewContextMenuObserver;
 class Profile;
 class SpellingMenuObserver;
@@ -277,9 +276,6 @@ class RenderViewContextMenu : public ui::SimpleMenuModel::Delegate,
   // An observer that disables menu items when print preview is active.
   scoped_ptr<PrintPreviewContextMenuObserver> print_preview_menu_observer_;
 
-  // An observer that disables menu items for instant extended mode.
-  scoped_ptr<InstantExtendedContextMenuObserver> instant_extended_observer_;
-
   // Our observers.
   mutable ObserverList<RenderViewContextMenuObserver> observers_;