GPU compositing surface handle is no longer sent to renderer process.

content/common/view_messages.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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "content/common/common_param_traits.h"
@@ skipping 683 matching lines @@
   IPC_STRUCT_MEMBER(base::Time, request_time)
 
   // Extra headers (separated by \n) to send during the request.
   IPC_STRUCT_MEMBER(std::string, extra_headers)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(ViewMsg_New_Params)
   // The parent window's id.
   IPC_STRUCT_MEMBER(gfx::NativeViewId, parent_window)
 
-  // Surface for accelerated rendering.
-  IPC_STRUCT_MEMBER(gfx::PluginWindowHandle, compositing_surface)
-
   // Renderer-wide preferences.
   IPC_STRUCT_MEMBER(RendererPreferences, renderer_preferences)
 
   // Preferences for this view.
   IPC_STRUCT_MEMBER(WebPreferences, web_preferences)
 
   // The ID of the view to be created.
   IPC_STRUCT_MEMBER(int32, view_id)
 
   // The session storage namespace ID this view should use.
@@ skipping 27 matching lines @@
 // Tells the renderer to create a new view.
 // This message is slightly different, the view it takes (via
 // ViewMsg_New_Params) is the view to create, the message itself is sent as a
 // non-view control message.
 IPC_MESSAGE_CONTROL1(ViewMsg_New,
                      ViewMsg_New_Params)
 
 // Reply in response to ViewHostMsg_ShowView or ViewHostMsg_ShowWidget.
 // similar to the new command, but used when the renderer created a view
 // first, and we need to update it.
-IPC_MESSAGE_ROUTED2(ViewMsg_CreatingNew_ACK,
-                    gfx::NativeViewId /* parent_hwnd */,
-                    gfx::PluginWindowHandle /* compositing_surface */)
+IPC_MESSAGE_ROUTED1(ViewMsg_CreatingNew_ACK,
+                    gfx::NativeViewId /* parent_hwnd */)
 
 // Sends updated preferences to the renderer.
 IPC_MESSAGE_ROUTED1(ViewMsg_SetRendererPrefs,
                     RendererPreferences)
 
 // This passes a set of webkit preferences down to the renderer.
 IPC_MESSAGE_ROUTED1(ViewMsg_UpdateWebPreferences,
                     WebPreferences)
 
 // Tells the render view to close.
@@ skipping 1189 matching lines @@
 
 // Send back a string to be recorded by UserMetrics.
 IPC_MESSAGE_CONTROL1(ViewHostMsg_UserMetricsRecordAction,
                      std::string /* action */)
 
 // Provide the browser process with current renderer framerate.
 IPC_MESSAGE_CONTROL2(ViewHostMsg_FPS,
                      int /* routing id */,
                      float /* frames per second */)