Add SkColorSpace to GrDrawContext

src/core/SkSpecialSurface.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file
  */
 
 #ifndef SkSpecialSurface_DEFINED
 #define SkSpecialSurface_DEFINED
 
@@ skipping 39 matching lines @@
     */
     sk_sp<SkSpecialImage> makeImageSnapshot();
 
 #if SK_SUPPORT_GPU
     /**
      *  Allocate a new GPU-backed SkSpecialSurface. If the requested surface cannot
      *  be created, nullptr will be returned.
      */
     static sk_sp<SkSpecialSurface> MakeRenderTarget(GrContext*,
                                                     int width, int height,
-                                                    GrPixelConfig config);
+                                                    GrPixelConfig config,
+                                                    sk_sp<SkColorSpace> colorSpace);
 #endif
 
     /**
      * Use and existing SkBitmap as the backing store.
      */
     static sk_sp<SkSpecialSurface> MakeFromBitmap(const SkIRect& subset, SkBitmap& bm,
                                                   const SkSurfaceProps* = nullptr);
 
     /**
      *  Return a new CPU-backed surface, with the memory for the pixels automatically
@@ skipping 13 matching lines @@
     const SkIRect& subset() const { return fSubset; }
 
 private:
     const SkSurfaceProps fProps;
     const SkIRect        fSubset;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif