Show extension icons next to their top-level context menu items....

chrome/browser/tab_contents/render_view_context_menu.h

Index: chrome/browser/tab_contents/render_view_context_menu.h
===================================================================
--- chrome/browser/tab_contents/render_view_context_menu.h	(revision 50770)
+++ chrome/browser/tab_contents/render_view_context_menu.h	(working copy)
@@ -91,6 +91,8 @@
       const std::vector<ExtensionMenuItem*>& items,
       menus::SimpleMenuModel* menu_model,
       int *index);
+  // This will set the icon on the most recently-added item in the menu_model_.
+  void SetExtensionIcon(const std::string& extension_id);
 
   // Opens the specified URL string in a new tab.  If |in_current_window| is
   // false, a new window is created to hold the new tab.