remove imagefilter::sizeconstraint

src/effects/SkGpuBlurUtils.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGpuBlurUtils_DEFINED
 #define SkGpuBlurUtils_DEFINED
 
@@ skipping 22 matching lines @@
     * @param sigmaY          The blur's standard deviation in Y.
     * @return the blurred texture, which may be srcTexture reffed, or a
     * new texture.  It is the caller's responsibility to unref this texture.
     */
     GrTexture* GaussianBlur(GrContext* context,
                             GrTexture* srcTexture,
                             bool canClobberSrc,
                             const SkRect& dstBounds,
                             const SkRect* srcBounds,
                             float sigmaX,
-                            float sigmaY,
-                            GrTextureProvider::SizeConstraint);
+                            float sigmaY);
 #endif
 
 };
 
 #endif