gpu: reference target surfaces through a globally unique surface id.

content/test/mock_render_thread.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_TEST_MOCK_RENDER_THREAD_H_
 #define CONTENT_TEST_MOCK_RENDER_THREAD_H_
 #pragma once
 
 #include "base/shared_memory.h"
 #include "base/string16.h"
@@ skipping 60 matching lines @@
   virtual void ReleaseCachedFonts() OVERRIDE;
 #endif
 
   //////////////////////////////////////////////////////////////////////////
   // The following functions are called by the test itself.
 
   void set_routing_id(int32 id) {
     routing_id_ = id;
   }
 
+  void set_surface_id(int32 id) {
+    surface_id_ = id;
+  }
+
   int32 opener_id() const {
     return opener_id_;
   }
 
   bool has_widget() const {
     return widget_ ? true : false;
   }
 
   // Simulates the Widget receiving a close message. This should result
   // on releasing the internal reference counts and destroying the internal
   // state.
   void SendCloseMessage();
 
  protected:
   // This function operates as a regular IPC listener. Subclasses
   // overriding this should first delegate to this implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
   // The Widget expects to be returned valid route_id.
   void OnMsgCreateWidget(int opener_id,
                          WebKit::WebPopupType popup_type,
-                         int* route_id);
+                         int* route_id,
+                         int* surface_id);
 
 #if defined(OS_WIN)
   void OnDuplicateSection(base::SharedMemoryHandle renderer_handle,
                           base::SharedMemoryHandle* browser_handle);
 #endif
 
   IPC::TestSink sink_;
 
   // Routing id what will be assigned to the Widget.
   int32 routing_id_;
 
+  // Surface id what will be assigned to the Widget.
+  int32 surface_id_;
+
   // Opener id reported by the Widget.
   int32 opener_id_;
 
   // We only keep track of one Widget, we learn its pointer when it
   // adds a new route.
   IPC::Channel::Listener* widget_;
 
   // The last known good deserializer for sync messages.
   scoped_ptr<IPC::MessageReplyDeserializer> reply_deserializer_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_MOCK_RENDER_THREAD_H_