Replace GrExtractAlphaFragmentProcessor with DstIn compose processor

src/core/SkBitmapProcShader.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcShader.h"
 #include "SkBitmapProcState.h"
 #include "SkBitmapProvider.h"
 #include "SkColorPriv.h"
 #include "SkErrorInternals.h"
 #include "SkPixelRef.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 
 #if SK_SUPPORT_GPU
 #include "effects/GrBicubicEffect.h"
-#include "effects/GrExtractAlphaFragmentProcessor.h"
 #include "effects/GrSimpleTextureEffect.h"
 #endif
 
 size_t SkBitmapProcShader::ContextSize() {
     // The SkBitmapProcState is stored outside of the context object, with the context holding
     // a pointer to it.
     return sizeof(BitmapProcShaderContext) + sizeof(SkBitmapProcState);
 }
 
 SkBitmapProcShader::SkBitmapProcShader(const SkBitmap& src, TileMode tmx, TileMode tmy,
@@ skipping 374 matching lines @@
     SkAutoTUnref<GrFragmentProcessor> inner;
     if (doBicubic) {
         inner.reset(GrBicubicEffect::Create(procDataManager, texture, matrix, tm));
     } else {
         inner.reset(GrSimpleTextureEffect::Create(procDataManager, texture, matrix, params));
     }
 
     if (kAlpha_8_SkColorType == fRawBitmap.colorType()) {
         return SkRef(inner.get());
     }
-    return GrExtractAlphaFragmentProcessor::Create(inner);
+    return MulFragmentProcesorOuputByInputAlpha(inner);
 }
 
 #endif