Simplify SkGpuBlurUtils::GaussianBlur method

include/gpu/GrContext.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrContext_DEFINED
 #define GrContext_DEFINED
 
@@ skipping 184 matching lines @@
     sk_sp<GrDrawContext> drawContext(sk_sp<GrRenderTarget> rt, const SkSurfaceProps* = nullptr);
 
     /**
      * Create both a GrRenderTarget and a matching GrDrawContext to wrap it.
      * The created GrRenderTarget will always be budgeted.
      */
     sk_sp<GrDrawContext> newDrawContext(SkBackingFit fit, 
                                         int width, int height,
                                         GrPixelConfig config,
                                         int sampleCnt = 0,
-                                        GrSurfaceOrigin origin = kDefault_GrSurfaceOrigin);
+                                        GrSurfaceOrigin origin = kDefault_GrSurfaceOrigin,
+                                        const SkSurfaceProps* surfaceProps = nullptr);
 
     ///////////////////////////////////////////////////////////////////////////
     // Misc.
 
     /**
      * Flags that affect flush() behavior.
      */
     enum FlushBits {
         /**
          * A client may reach a point where it has partially rendered a frame
@@ skipping 280 matching lines @@
     SkAutoTUnref<const GrCaps>  fCaps;
     uint32_t                    fContextUniqueID;
 
     friend class GrContext;
     friend class SkImage;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif