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

src/animator/SkDrawDiscrete.h

 /*
  * Copyright 2006 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 SkDrawDiscrete_DEFINED
 #define SkDrawDiscrete_DEFINED
 
 #include "SkPaintPart.h"
 
 class SkDiscrete : public SkDrawPathEffect {
     DECLARE_MEMBER_INFO(Discrete);
     SkDiscrete();
-    virtual SkPathEffect* getPathEffect() SK_OVERRIDE;
+    SkPathEffect* getPathEffect() SK_OVERRIDE;
 private:
     SkScalar deviation;
     SkScalar segLength;
 };
 
 #endif //SkDrawDiscrete_DEFINED