Add SkColorSpace to GrDrawContext

src/gpu/GrRenderTarget.cpp

Index: src/gpu/GrRenderTarget.cpp
diff --git a/src/gpu/GrRenderTarget.cpp b/src/gpu/GrRenderTarget.cpp
index 6a9d48997ee5b2c57f8ee0598d944feb8be8c41c..9eba1806c0ace822c0ca0acbff9f86325efdb677 100644
--- a/src/gpu/GrRenderTarget.cpp
+++ b/src/gpu/GrRenderTarget.cpp
@@ -29,7 +29,7 @@ void GrRenderTarget::discard() {
         return;
     }
 
-    sk_sp<GrDrawContext> drawContext(context->drawContext(sk_ref_sp(this)));
+    sk_sp<GrDrawContext> drawContext(context->drawContext(sk_ref_sp(this), nullptr));
     if (!drawContext) {
         return;
     }