Restore original WebView SurfaceId after showing interstitial.

content/browser/frame_host/render_widget_host_view_child_frame.h

 // Copyright 2014 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_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 165 matching lines @@
   // The model object.
   RenderWidgetHostImpl* host_;
 
   // Flag determining whether we render into a compositing Surface.
   bool use_surfaces_;
 
   // Surface-related state.
   scoped_ptr<cc::SurfaceIdAllocator> id_allocator_;
   scoped_ptr<cc::SurfaceFactory> surface_factory_;
   cc::SurfaceId surface_id_;
-  uint32 next_surface_sequence_;
+  cc::SurfaceSequence surface_sequence_;
   uint32 last_output_surface_id_;
   gfx::Size current_surface_size_;
   float current_surface_scale_factor_;
   uint32 ack_pending_count_;
   cc::ReturnedResourceArray surface_returned_resources_;
 
   // frame_connector_ provides a platform abstraction. Messages
   // sent through it are routed to the embedding renderer process.
   CrossProcessFrameConnector* frame_connector_;
 
   base::WeakPtr<RenderWidgetHostViewChildFrame> AsWeakPtr() {
     return weak_factory_.GetWeakPtr();
   }
 
  private:
   base::WeakPtrFactory<RenderWidgetHostViewChildFrame> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewChildFrame);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_