Cleanup namespace usage in platform/graphics/[filters/* to skia/*] and platform/graphics/[B-D]*

Source/platform/graphics/skia/NativeImageSkia.h

 /*
  * Copyright (c) 2008, 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 80 matching lines @@
     //
     // scaledImageSubset
     // Rectangle of the subset in the scaled image.
     SkBitmap resizedBitmap(const SkISize& scaledImageSize, const SkIRect& scaledImageSubset) const;
 
     void draw(
         GraphicsContext*,
         const SkRect& srcRect,
         const SkRect& destRect,
         CompositeOperator,
-        blink::WebBlendMode) const;
+        WebBlendMode) const;
 
     void drawPattern(
         GraphicsContext*,
         const FloatRect& srcRect,
         const FloatSize& scale,
         const FloatPoint& phase,
         CompositeOperator,
         const FloatRect& destRect,
-        blink::WebBlendMode,
+        WebBlendMode,
         const IntSize& repeatSpacing) const;
 
 private:
     NativeImageSkia();
 
     NativeImageSkia(const SkBitmap&);
 
     // ImageResourceInfo is used to uniquely identify cached or requested image
     // resizes.
     // Image resize is identified by the scaled image size and scaled image subset.
@@ skipping 42 matching lines @@
     // This allows us to see if many requests have been made for the same
     // resized image, we know that we should probably cache it, even if all of
     // those requests individually are small and would not otherwise be cached.
     //
     // We also track scaling information and destination subset for the scaled
     // image. See comments for ImageResourceInfo.
     mutable ImageResourceInfo m_cachedImageInfo;
     mutable int m_resizeRequests;
 };
 
-}
+} // namespace blink
+
 #endif  // NativeImageSkia_h