Fix virtual/override/final usage in the rest of Source/core/.

Source/core/frame/ImageBitmap.h

 // Copyright 2013 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 ImageBitmap_h
 #define ImageBitmap_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/html/HTMLImageElement.h"
@@ skipping 23 matching lines @@
 
     PassRefPtr<Image> bitmapImage() const;
     PassRefPtrWillBeRawPtr<HTMLImageElement> imageElement() const { return m_imageElement; }
 
     IntRect bitmapRect() const { return m_bitmapRect; }
 
     int width() const { return m_cropRect.width(); }
     int height() const { return m_cropRect.height(); }
     IntSize size() const { return m_cropRect.size(); }
 
-    virtual ~ImageBitmap();
+    ~ImageBitmap() override;
 
     // CanvasImageSource implementation
-    virtual PassRefPtr<Image> getSourceImageForCanvas(SourceImageMode, SourceImageStatus*) const override;
-    virtual bool wouldTaintOrigin(SecurityOrigin*) const override { return false; }
-    virtual void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const override;
-    virtual FloatSize elementSize() const override;
+    PassRefPtr<Image> getSourceImageForCanvas(SourceImageMode, SourceImageStatus*) const override;
+    bool wouldTaintOrigin(SecurityOrigin*) const override { return false; }
+    void adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const override;
+    FloatSize elementSize() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     ImageBitmap(HTMLImageElement*, const IntRect&);
     ImageBitmap(HTMLVideoElement*, const IntRect&);
     ImageBitmap(HTMLCanvasElement*, const IntRect&);
     ImageBitmap(ImageData*, const IntRect&);
     ImageBitmap(ImageBitmap*, const IntRect&);
     ImageBitmap(Image*, const IntRect&);
 
     // ImageLoaderClient
-    virtual void notifyImageSourceChanged() override;
-    virtual bool requestsHighLiveResourceCachePriority() override { return true; }
+    void notifyImageSourceChanged() override;
+    bool requestsHighLiveResourceCachePriority() override { return true; }
 
     // ImageBitmaps constructed from HTMLImageElements hold a reference to the HTMLImageElement until
     // the image source changes.
     RefPtrWillBeMember<HTMLImageElement> m_imageElement;
     RefPtr<Image> m_bitmap;
 
     IntRect m_bitmapRect; // The rect where the underlying Image should be placed in reference to the ImageBitmap.
     IntRect m_cropRect;
 
     // The offset by which the desired Image is stored internally.
     // ImageBitmaps constructed from HTMLImageElements reference the entire ImageResource and may have a non-zero bitmap offset.
     // ImageBitmaps not constructed from HTMLImageElements always pre-crop and store the image at (0, 0).
     IntPoint m_bitmapOffset;
 
 };
 
 } // namespace blink
 
 #endif // ImageBitmap_h