Extract minimal RenderViewHost interface for embedders, leaving

content/browser/tab_contents/popup_menu_helper_mac.h

Index: content/browser/tab_contents/popup_menu_helper_mac.h
diff --git a/content/browser/tab_contents/popup_menu_helper_mac.h b/content/browser/tab_contents/popup_menu_helper_mac.h
index 63124e13d15e3f4f60b90c9dff085d9340eaa5dc..74f6f6a16d5a1ff7cfd74800c633b86a08b3ded2 100644
--- a/content/browser/tab_contents/popup_menu_helper_mac.h
+++ b/content/browser/tab_contents/popup_menu_helper_mac.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -13,6 +13,7 @@
 #include "ui/gfx/rect.h"
 
 class RenderViewHost;
+class RenderViewHostImpl;
 struct WebMenuItem;
 
 class PopupMenuHelper : public content::NotificationObserver {
@@ -39,7 +40,7 @@ class PopupMenuHelper : public content::NotificationObserver {
 
   content::NotificationRegistrar notification_registrar_;
 
-  RenderViewHost* render_view_host_;
+  RenderViewHostImpl* render_view_host_;
 
   DISALLOW_COPY_AND_ASSIGN(PopupMenuHelper);
 };