Devirtualize ImageQualityController and TextAutosizer destructors

Source/core/rendering/ImageQualityController.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 29 matching lines @@
 #include "wtf/HashMap.h"
 
 namespace WebCore {
 
 typedef HashMap<const void*, LayoutSize> LayerSizeMap;
 typedef HashMap<RenderObject*, LayerSizeMap> ObjectLayerSizeMap;
 
 class ImageQualityController {
     WTF_MAKE_NONCOPYABLE(ImageQualityController); WTF_MAKE_FAST_ALLOCATED;
 public:
-    virtual ~ImageQualityController();
+    ~ImageQualityController();
 
     static ImageQualityController* imageQualityController();
 
     static void remove(RenderObject*);
 
     bool shouldPaintAtLowQuality(GraphicsContext*, RenderObject*, Image*, const void* layer, const LayoutSize&);
 
 private:
     ImageQualityController();
 
     void removeLayer(RenderObject*, LayerSizeMap* innerMap, const void* layer);
     void set(RenderObject*, LayerSizeMap* innerMap, const void* layer, const LayoutSize&);
     void objectDestroyed(RenderObject*);
     bool isEmpty() { return m_objectLayerSizeMap.isEmpty(); }
 
     void highQualityRepaintTimerFired(Timer<ImageQualityController>*);
     void restartTimer();
 
     ObjectLayerSizeMap m_objectLayerSizeMap;
     Timer<ImageQualityController> m_timer;
     bool m_animatedResizeIsActive;
     bool m_liveResizeOptimizationIsActive;
 };
 
 } // namespace WebCore
 
 #endif