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

content/renderer/render_widget.cc

 // 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.
 
 #include "content/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 52 matching lines @@
 using WebKit::WebScreenInfo;
 using WebKit::WebSize;
 using WebKit::WebTextDirection;
 using WebKit::WebTouchEvent;
 using WebKit::WebVector;
 using WebKit::WebWidget;
 using content::RenderThread;
 
 RenderWidget::RenderWidget(WebKit::WebPopupType popup_type)
     : routing_id_(MSG_ROUTING_NONE),
+      surface_id_(0),
       webwidget_(NULL),
       opener_id_(MSG_ROUTING_NONE),
       host_window_(0),
       current_paint_buf_(NULL),
       next_paint_flags_(0),
       filtered_time_per_frame_(0.0f),
       update_reply_pending_(false),
       using_asynchronous_swapbuffers_(false),
       num_swapbuffers_complete_pending_(0),
       did_show_(false),
@@ skipping 51 matching lines @@
       return WebPopupMenu::create(render_widget);
     default:
       NOTREACHED();
   }
   return NULL;
 }
 
 void RenderWidget::Init(int32 opener_id) {
   DoInit(opener_id,
          RenderWidget::CreateWebWidget(this),
-         new ViewHostMsg_CreateWidget(opener_id, popup_type_, &routing_id_));
+         new ViewHostMsg_CreateWidget(opener_id, popup_type_,
+                                      &routing_id_, &surface_id_));
 }
 
 void RenderWidget::DoInit(int32 opener_id,
                           WebWidget* web_widget,
                           IPC::SyncMessage* create_widget_message) {
   DCHECK(!webwidget_);
 
   if (opener_id != MSG_ROUTING_NONE)
     opener_id_ = opener_id;
 
@@ skipping 1407 matching lines @@
   }
 }
 
 bool RenderWidget::WillHandleMouseEvent(const WebKit::WebMouseEvent& event) {
   return false;
 }
 
 bool RenderWidget::WebWidgetHandlesCompositorScheduling() const {
   return false;
 }