Allow plugins to participate in Chrome context menus.

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 114593)
+++ chrome/browser/tab_contents/render_view_context_menu.h	(working copy)
@@ -36,6 +36,7 @@
 
 namespace WebKit {
 struct WebMediaPlayerAction;
+struct WebPluginAction;
 }
 
 // An interface that controls a RenderViewContextMenu instance from observers.
@@ -243,6 +244,8 @@
   void MediaPlayerActionAt(const gfx::Point& location,
                            const WebKit::WebMediaPlayerAction& action);
 
+  void PluginAction(const WebKit::WebPluginAction& action);
+
   bool IsDevCommandEnabled(int id) const;
 
   // Returns a list of registered ProtocolHandlers that can handle the clicked