Plumb GrContext everywhere

There is no good way to split the monster CL up. This breaks out
the GrContext plumbing but doesn't use it.

Change-Id: I90856d428d372bcec3f8821e6364667b367927d4
Reviewed-on: https://skia-review.googlesource.com/133382
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
diff --git a/gm/texturedomaineffect.cpp b/gm/texturedomaineffect.cpp
index 63e0111..5b96859 100644
--- a/gm/texturedomaineffect.cpp
+++ b/gm/texturedomaineffect.cpp
@@ -132,7 +132,7 @@
                     const SkMatrix viewMatrix = SkMatrix::MakeTrans(x, y);
                     grPaint.addColorFragmentProcessor(std::move(fp));
                     renderTargetContext->priv().testingOnly_addDrawOp(
-                            GrRectOpFactory::MakeNonAAFill(std::move(grPaint), viewMatrix,
+                            GrRectOpFactory::MakeNonAAFill(context, std::move(grPaint), viewMatrix,
                                                            renderRect, GrAAType::kNone));
                     x += renderRect.width() + kTestPad;
                 }