Fix up all the easy virtual ... SK_OVERRIDE cases.

include/effects/SkPaintFlagsDrawFilter.h

 /*
  * Copyright 2008 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 SkPaintFlagsDrawFilter_DEFINED
 #define SkPaintFlagsDrawFilter_DEFINED
 
 #include "SkDrawFilter.h"
 
 class SK_API SkPaintFlagsDrawFilter : public SkDrawFilter {
 public:
     SkPaintFlagsDrawFilter(uint32_t clearFlags, uint32_t setFlags);
 
-    virtual bool filter(SkPaint*, Type) SK_OVERRIDE;
+    bool filter(SkPaint*, Type) SK_OVERRIDE;
 
 private:
     uint16_t    fClearFlags;    // user specified
     uint16_t    fSetFlags;      // user specified
 };
 
 #endif