Add SkColorSpace to GrDrawContext

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2164363002

Review-Url: https://codereview.chromium.org/2164363002
diff --git a/tests/WritePixelsTest.cpp b/tests/WritePixelsTest.cpp
index 90f5d80..ec88f03 100644
--- a/tests/WritePixelsTest.cpp
+++ b/tests/WritePixelsTest.cpp
@@ -416,7 +416,7 @@
         desc.fOrigin = origin;
         SkAutoTUnref<GrTexture> texture(
             ctxInfo.grContext()->textureProvider()->createTexture(desc, SkBudgeted::kNo));
-        auto surface(SkSurface::MakeRenderTargetDirect(texture->asRenderTarget()));
+        auto surface(SkSurface::MakeRenderTargetDirect(texture->asRenderTarget(), nullptr));
         test_write_pixels(reporter, surface.get());
     }
 }