Retract GrContext from src/gpu/effects

Change-Id: Iceb7263098286bafb2605ef17d1fe6bb25d71e97
Reviewed-on: https://skia-review.googlesource.com/9693
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrSoftwarePathRenderer.cpp b/src/gpu/GrSoftwarePathRenderer.cpp
index 22b2f3c..0228937 100644
--- a/src/gpu/GrSoftwarePathRenderer.cpp
+++ b/src/gpu/GrSoftwarePathRenderer.cpp
@@ -226,7 +226,7 @@
                           unclippedDevShapeBounds);
     }
     GrSWMaskHelper::DrawToTargetWithShapeMask(
-            args.fContext, std::move(proxy), args.fRenderTargetContext, std::move(args.fPaint),
+            std::move(proxy), args.fRenderTargetContext, std::move(args.fPaint),
             *args.fUserStencilSettings, *args.fClip, *args.fViewMatrix,
             SkIPoint{boundsForMask->fLeft, boundsForMask->fTop}, *boundsForMask);