Fixing another clusterfuzz issue

src/core/SkValidatingReadBuffer.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkValidatingReadBuffer_DEFINED
 #define SkValidatingReadBuffer_DEFINED
 
 #include "SkRefCnt.h"
 #include "SkBitmapHeap.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkPath.h"
 #include "SkPicture.h"
 #include "SkReader32.h"
 
 class SkBitmap;
 
 class SkValidatingReadBuffer : public SkReadBuffer {
 public:
     SkValidatingReadBuffer(const void* data, size_t size);
     virtual ~SkValidatingReadBuffer();
 
-    const void* skip(size_t size);
+    virtual const void* skip(size_t size) SK_OVERRIDE;
 
     // primitives
     virtual bool readBool() SK_OVERRIDE;
     virtual SkColor readColor() SK_OVERRIDE;
     virtual SkFixed readFixed() SK_OVERRIDE;
     virtual int32_t readInt() SK_OVERRIDE;
     virtual SkScalar readScalar() SK_OVERRIDE;
     virtual uint32_t readUInt() SK_OVERRIDE;
     virtual int32_t read32() SK_OVERRIDE;
 
@@ skipping 37 matching lines @@
     static bool IsPtrAlign4(const void* ptr) {
         return SkIsAlign4((uintptr_t)ptr);
     }
 
     bool fError;
 
     typedef SkReadBuffer INHERITED;
 };
 
 #endif // SkValidatingReadBuffer_DEFINED