Force new surface on BrowserPluginGuest reattach.

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 "base/memory/scoped_ptr.h"
 #include "cc/resources/returned_resource.h"
 #include "cc/surfaces/surface_factory_client.h"
@@ skipping 140 matching lines @@
 
   // Declared 'public' instead of 'protected' here to allow derived classes
   // to Bind() to it.
   void SurfaceDrawn(uint32 output_surface_id, cc::SurfaceDrawStatus drawn);
 
  protected:
   friend class RenderWidgetHostView;
   friend class RenderWidgetHostViewChildFrameTest;
   friend class RenderWidgetHostViewGuestSurfaceTest;
 
+  // Clears current compositor surface, if one is in use.
+  void ClearCompositorSurfaceIfNecessary();
+
   // The last scroll offset of the view.
   gfx::Vector2dF last_scroll_offset_;
 
   // Members will become private when RenderWidgetHostViewGuest is removed.
   // The model object.
   RenderWidgetHostImpl* host_;
 
   // Flag determining whether we render into a compositing Surface.
   bool use_surfaces_;
 
@@ skipping 17 matching lines @@
   }
 
  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_