Remove asFragmentProcessor gpu-specific ImageFilter code path

include/core/SkImageFilter.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageFilter_DEFINED
 #define SkImageFilter_DEFINED
 
@@ skipping 164 matching lines @@
     SkIRect filterBounds(const SkIRect& src, const SkMatrix& ctm,
                          MapDirection = kReverse_MapDirection) const;
 
     /**
      *  Returns true if the filter can be processed on the GPU.  This is most
      *  often used for multi-pass effects, where intermediate results must be
      *  rendered to textures.  For single-pass effects, use asFragmentProcessor().
      *  The default implementation returns asFragmentProcessor(NULL, NULL, SkMatrix::I(),
      *  SkIRect()).
      */
-    virtual bool canFilterImageGPU() const;
+    virtual bool canFilterImageGPU() const { return false; }
 
     /**
      *  Process this image filter on the GPU.  This is most often used for
      *  multi-pass effects, where intermediate results must be rendered to
      *  textures.  For single-pass effects, use asFragmentProcessor().  src is the
      *  source image for processing, as a texture-backed bitmap.  result is
      *  the destination bitmap, which should contain a texture-backed pixelref
      *  on success.  offset is the amount to translate the resulting image
      *  relative to the src when it is drawn. The default implementation does
      *  single-pass processing using asFragmentProcessor().
      */
-    virtual bool filterImageGPUDeprecated(Proxy*, const SkBitmap& src, const Context&,
-                                          SkBitmap* result, SkIPoint* offset) const;
+    virtual bool filterImageGPUDeprecated(Proxy*, const SkBitmap&, const Context&,
+                                          SkBitmap*, SkIPoint*) const {
+        SkASSERT(false);
+        return false;
+    }
 
 #if SK_SUPPORT_GPU
     static sk_sp<SkSpecialImage> DrawWithFP(GrContext* context, 
                                             sk_sp<GrFragmentProcessor> fp,
                                             const SkIRect& bounds,
                                             SkImageFilter::Proxy* proxy);
 #endif
 
     /**
      *  Returns whether this image filter is a color filter and puts the color filter into the
@@ skipping 236 matching lines @@
      *  which are not capable of processing a smaller source bitmap into a
      *  larger destination.
      */
     bool applyCropRectDeprecated(const Context&, Proxy* proxy, const SkBitmap& src,
                                  SkIPoint* srcOffset, SkIRect* bounds, SkBitmap* result) const;
 
     sk_sp<SkSpecialImage> applyCropRect(const Context&, SkSpecialImage* src, SkIPoint* srcOffset,
                                         SkIRect* bounds) const;
 
     /**
-     *  Returns true if the filter can be expressed a single-pass
-     *  GrProcessor, used to process this filter on the GPU, or false if
-     *  not.
-     *
-     *  If effect is non-NULL, a new GrProcessor instance is stored
-     *  in it.  The caller assumes ownership of the stage, and it is up to the
-     *  caller to unref it.
-     *
-     *  The effect can assume its vertexCoords space maps 1-to-1 with texels
-     *  in the texture.  "matrix" is a transformation to apply to filter
-     *  parameters before they are used in the effect. Note that this function
-     *  will be called with (NULL, NULL, SkMatrix::I()) to query for support,
-     *  so returning "true" indicates support for all possible matrices.
-     */
-    virtual bool asFragmentProcessor(GrFragmentProcessor**, GrTexture*, const SkMatrix&,
-                                     const SkIRect& bounds) const;
-
-    /**
      *  Creates a modified Context for use when recursing up the image filter DAG.
      *  The clip bounds are adjusted to accommodate any margins that this
      *  filter requires by calling this node's
      *  onFilterNodeBounds(..., kReverse_MapDirection).
      */
     Context mapContext(const Context& ctx) const;
 
 private:
     friend class SkGraphics;
     static void PurgeCache();
@@ skipping 19 matching lines @@
  */
 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount)    \
     Common localVar;                                                \
     do {                                                            \
         if (!localVar.unflatten(buffer, expectedCount)) {           \
             return NULL;                                            \
         }                                                           \
     } while (0)
 
 #endif