Fix for potential typedef issue

src/effects/SkLumaXfermode.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkLumaXfermode.h"
 #include "SkColorPriv.h"
 #include "SkFlattenableBuffers.h"
 #include "SkString.h"
 
 #if SK_SUPPORT_GPU
 #include "gl/GrGLEffect.h"
 #include "gl/GrGLEffectMatrix.h"
 #include "GrContext.h"
 #include "GrTBackendEffectFactory.h"
 #endif
 
 class SkLumaMaskXfermodeSrcOver : public SkLumaMaskXfermode {
+    typedef SkLumaMaskXfermode INHERITED;
+
 public:
     SkLumaMaskXfermodeSrcOver();
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLumaMaskXfermodeSrcOver)
 
 protected:
     SkLumaMaskXfermodeSrcOver(SkFlattenableReadBuffer&);
 
 private:
-    typedef SkLumaMaskXfermode INHERITED;
 
     virtual SkPMColor lumaProc(const SkPMColor a, const SkPMColor b) const;
 };
 
 SkPMColor SkLumaMaskXfermode::lumaProc(const SkPMColor a, const SkPMColor b) const {
     unsigned luma = SkComputeLuminance(SkGetPackedR32(b),
                                        SkGetPackedG32(b),
                                        SkGetPackedB32(b));
     return SkAlphaMulQ(a, SkAlpha255To256(luma));
 }
@@ skipping 227 matching lines @@
     // No background texture support.
     if (effect && !background) {
         *effect = GrLumaMaskEffect::Create(fMode);
         return true;
     }
 
     return false;
 }
 
 #endif // SK_SUPPORT_GPU