Initial error handling code

include/effects/SkKernel33MaskFilter.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 SkKernel33MaskFilter_DEFINED
 #define SkKernel33MaskFilter_DEFINED
 
 #include "SkMaskFilter.h"
 
 class SK_API SkKernel33ProcMaskFilter : public SkMaskFilter {
+    typedef SkMaskFilter INHERITED;
+
 public:
     SkKernel33ProcMaskFilter(unsigned percent256 = 256)
         : fPercent256(percent256) {}
 
     virtual uint8_t computeValue(uint8_t* const* srcRows) const = 0;
 
     virtual SkMask::Format getFormat() const SK_OVERRIDE;
     virtual bool filterMask(SkMask*, const SkMask&, const SkMatrix&,
                             SkIPoint*) const SK_OVERRIDE;
 
     SkDEVCODE(virtual void toString(SkString* str) const SK_OVERRIDE;)
 
 protected:
     SkKernel33ProcMaskFilter(SkFlattenableReadBuffer& rb);
     virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
 
 private:
     int fPercent256;
-
-    typedef SkMaskFilter INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class SK_API SkKernel33MaskFilter : public SkKernel33ProcMaskFilter {
+    typedef SkKernel33ProcMaskFilter INHERITED;
+
 public:
     SkKernel33MaskFilter(const int coeff[3][3], int shift, int percent256 = 256)
             : SkKernel33ProcMaskFilter(percent256) {
         memcpy(fKernel, coeff, 9 * sizeof(int));
         fShift = shift;
     }
 
     // override from SkKernel33ProcMaskFilter
     virtual uint8_t computeValue(uint8_t* const* srcRows) const SK_OVERRIDE;
 
     SkDEVCODE(virtual void toString(SkString* str) const SK_OVERRIDE;)
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkKernel33MaskFilter)
 
 private:
     int fKernel[3][3];
     int fShift;
 
     SkKernel33MaskFilter(SkFlattenableReadBuffer& rb);
     virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
-
-    typedef SkKernel33ProcMaskFilter INHERITED;
 };
 
 #endif