Move gaussianBlur functionality to src\effects

src/effects/SkBlurImageFilter.cpp

 /*
  * Copyright 2011 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.
  */
 
 #include "SkBitmap.h"
 #include "SkBlurImageFilter.h"
 #include "SkColorPriv.h"
 #include "SkFlattenableBuffers.h"
+#include "SkGpuBlurUtils.h"
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
 #include "SkImageFilterUtils.h"
 #endif
 
 SkBlurImageFilter::SkBlurImageFilter(SkFlattenableReadBuffer& buffer)
   : INHERITED(buffer) {
     fSigma.fWidth = buffer.readScalar();
     fSigma.fHeight = buffer.readScalar();
 }
@@ skipping 174 matching lines @@
 bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, SkBitmap* result,
                                        SkIPoint* offset) {
 #if SK_SUPPORT_GPU
     SkBitmap input;
     if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, &input, offset)) {
         return false;
     }
     GrTexture* source = input.getTexture();
     SkRect rect;
     src.getBounds(&rect);
-    SkAutoTUnref<GrTexture> tex(source->getContext()->gaussianBlur(source, false, rect,
-        fSigma.width(), fSigma.height()));
+    SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(), 
+                                                             source, false, rect,
+                                                             fSigma.width(), fSigma.height()));
     return SkImageFilterUtils::WrapTexture(tex, src.width(), src.height(), result);
 #else
     SkDEBUGFAIL("Should not call in GPU-less build");
     return false;
 #endif
 }