Add SkColorSpace to GrDrawContext

tests/SpecialSurfaceTest.cpp

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file
 */
 
 #include "SkCanvas.h"
 #include "SkSpecialImage.h"
 #include "SkSpecialSurface.h"
@@ skipping 63 matching lines @@
     test_surface(surf, reporter, kPad);
 
     // TODO: check that the clear didn't escape the active region
 }
 
 #if SK_SUPPORT_GPU
 
 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialSurface_Gpu1, reporter, ctxInfo) {
     sk_sp<SkSpecialSurface> surf(SkSpecialSurface::MakeRenderTarget(ctxInfo.grContext(),
                                                                     kSmallerSize, kSmallerSize,
-                                                                    kSkia8888_GrPixelConfig));
+                                                                    kSkia8888_GrPixelConfig,
+                                                                    nullptr));
 
     test_surface(surf, reporter, 0);
 }
 
 #endif