Clean up GrResourceProvider usage

The only substantive changes are the removal of GrProxy instantiation in:

SkGpuBlurUtils::GaussianBlur
GrSimpleTextureEffect::Make*

Change-Id: I10970609693bd6ff5b3a3c21b41d82642bb277bc
Reviewed-on: https://skia-review.googlesource.com/19965
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrSWMaskHelper.cpp b/src/gpu/GrSWMaskHelper.cpp
index fb66886..8809913 100644
--- a/src/gpu/GrSWMaskHelper.cpp
+++ b/src/gpu/GrSWMaskHelper.cpp
@@ -160,8 +160,6 @@
         return;
     }
 
-    GrResourceProvider* resourceProvider = renderTargetContext->resourceProvider();
-
     SkRect dstRect = SkRect::Make(deviceSpaceRectToDraw);
 
     // We use device coords to compute the texture coordinates. We take the device coords and apply
@@ -171,7 +169,7 @@
                                               SkIntToScalar(-textureOriginInDeviceSpace.fY));
     maskMatrix.preConcat(viewMatrix);
     paint.addCoverageFragmentProcessor(GrSimpleTextureEffect::Make(
-            resourceProvider, std::move(proxy), nullptr, maskMatrix,
+            std::move(proxy), nullptr, maskMatrix,
             GrSamplerParams::kNone_FilterMode));
     renderTargetContext->addDrawOp(clip,
                                    GrRectOpFactory::MakeNonAAFillWithLocalMatrix(