Associate an id with the output surface to handle lost contexts

content/browser/browser_plugin/browser_plugin_guest.h

 // 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.
 
 // A BrowserPluginGuest is the browser side of a browser <--> embedder
 // renderer channel. A BrowserPlugin (a WebPlugin) is on the embedder
 // renderer side of browser <--> embedder renderer communication.
 //
 // BrowserPluginGuest lives on the UI thread of the browser process. It has a
 // helper, BrowserPluginGuestHelper, which is a RenderViewHostObserver. The
@@ skipping 280 matching lines @@
 
   void RequestNewWindowPermission(WebContentsImpl* new_contents,
                                   WindowOpenDisposition disposition,
                                   const gfx::Rect& initial_bounds,
                                   bool user_gesture);
 
   // Message handlers for messages from embedder.
 
   void OnCompositorFrameACK(int instance_id,
                             int route_id,
+                            uint32 output_surface_id,
                             int renderer_host_id,
                             const cc::CompositorFrameAck& ack);
 
   // Allows or denies a permission request access, after the embedder has had a
   // chance to decide.
   void OnRespondPermission(int instance_id,
                            BrowserPluginPermissionType permission_type,
                            int request_id,
                            bool should_allow);
   // Handles drag events from the embedder.
@@ skipping 171 matching lines @@
   std::queue<IPC::Message*> pending_messages_;
 
   scoped_ptr<BrowserPluginGuestDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginGuest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_GUEST_H_