change back to method for localmatrix imagefilter

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 212 matching lines @@
 
     CropRect getCropRect() const { return fCropRect; }
 
     // Default impl returns union of all input bounds.
     virtual void computeFastBounds(const SkRect&, SkRect*) const;
 
     // Can this filter DAG compute the resulting bounds of an object-space rectangle?
     bool canComputeFastBounds() const;
 
     /**
+     *  If this filter can be represented by another filter + a localMatrix, return that filter,
+     *  else return null.
+     */
+    SkImageFilter* newWithLocalMatrix(const SkMatrix& matrix) const;
+
+    /**
      * Create an SkMatrixImageFilter, which transforms its input by the given matrix.
      */
     static SkImageFilter* CreateMatrixFilter(const SkMatrix& matrix,
                                              SkFilterQuality,
                                              SkImageFilter* input = NULL);
 
-    /**
-     * Create an SkLocalMatrixImageFilter, which transform the filter parameters
-     * of its inputs by the given matrix.
-     */
-    static SkImageFilter* CreateLocalMatrixFilter(const SkMatrix& matrix,
-                                                  SkImageFilter* input);
-
 #if SK_SUPPORT_GPU
     /**
      * Wrap the given texture in a texture-backed SkBitmap.
      */
     static void WrapTexture(GrTexture* texture, int width, int height, SkBitmap* result);
 
     /**
      * Recursively evaluate this filter on the GPU. If the filter has no GPU
      * implementation, it will be processed in software and uploaded to the GPU.
      */
@@ skipping 155 matching lines @@
  */
 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount)    \
     Common localVar;                                                \
     do {                                                            \
         if (!localVar.unflatten(buffer, expectedCount)) {           \
             return NULL;                                            \
         }                                                           \
     } while (0)
 
 #endif