style nit cleanups. e.g. remove 'virtual' on override declarations

include/effects/SkBitmapSource.h

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkBitmapSource_DEFINED
 #define SkBitmapSource_DEFINED
 
@@ skipping 15 matching lines @@
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBitmapSource)
 
 protected:
     explicit SkBitmapSource(const SkBitmap& bitmap);
     SkBitmapSource(const SkBitmap& bitmap,
                    const SkRect& srcRect, const SkRect& dstRect,
                    SkFilterQuality filterQuality);
     void flatten(SkWriteBuffer&) const override;
 
-    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
-                               SkBitmap* result, SkIPoint* offset) const override;
+    bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
+                       SkBitmap* result, SkIPoint* offset) const override;
 
 private:
     SkBitmap fBitmap;
     SkRect   fSrcRect, fDstRect;
     SkFilterQuality fFilterQuality;
 
     typedef SkImageFilter INHERITED;
 };
 
 #endif