Reland "Update FragmentProcessor TextureSampler to hold an GrSurfaceProxyView."

This reverts commit c5c024791bb7a587223b807e00ffba4a3eb5fdb7.

Reason for revert: Doh

Original change's description:
> Revert "Update FragmentProcessor TextureSampler to hold an GrSurfaceProxyView."
> 
> This reverts commit acf5929ae0addc5188117142fd3fb39828baa8d5.
> 
> Reason for revert: May be blocking Chrome roll
> Original change's description:
> > Update FragmentProcessor TextureSampler to hold an GrSurfaceProxyView.
> > 
> > In future CLs I will update the Ops that create the TextureSamplers to pass
> > the GrSurfaceProxyView in.
> > 
> > Bug: skia:9556
> > Change-Id: I550dab64974d32e4c3047188063efa2d0832328e
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/259164
> > Commit-Queue: Greg Daniel <egdaniel@google.com>
> > Reviewed-by: Michael Ludwig <michaelludwig@google.com>
> 
> TBR=egdaniel@google.com,michaelludwig@google.com
> 
> Change-Id: Ic804a52c5c6d16a13a9cc2d85bb959f305134177
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: skia:9556
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/259433
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Commit-Queue: Robert Phillips <robertphillips@google.com>

TBR=egdaniel@google.com,robertphillips@google.com,michaelludwig@google.com

Change-Id: If2af5b5b323858e59c0c8db3b75477d74d78abfd
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:9556
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/259434
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/effects/GrGaussianConvolutionFragmentProcessor.cpp b/src/gpu/effects/GrGaussianConvolutionFragmentProcessor.cpp
index cc6b8d2..80bc165 100644
--- a/src/gpu/effects/GrGaussianConvolutionFragmentProcessor.cpp
+++ b/src/gpu/effects/GrGaussianConvolutionFragmentProcessor.cpp
@@ -123,11 +123,12 @@
                                       const GrFragmentProcessor& processor) {
     const GrGaussianConvolutionFragmentProcessor& conv =
             processor.cast<GrGaussianConvolutionFragmentProcessor>();
-    GrSurfaceProxy* proxy = conv.textureSampler(0).proxy();
+    const auto& view = conv.textureSampler(0).view();
+    GrSurfaceProxy* proxy = view.proxy();
     GrTexture& texture = *proxy->peekTexture();
 
     float imageIncrement[2] = {0};
-    float ySign = proxy->origin() != kTopLeft_GrSurfaceOrigin ? 1.0f : -1.0f;
+    float ySign = view.origin() != kTopLeft_GrSurfaceOrigin ? 1.0f : -1.0f;
     switch (conv.direction()) {
         case Direction::kX:
             imageIncrement[0] = 1.0f / texture.width();
@@ -153,7 +154,7 @@
             bounds[1] *= inv;
         } else {
             SkScalar inv = SkScalarInvert(SkIntToScalar(texture.height()));
-            if (proxy->origin() != kTopLeft_GrSurfaceOrigin) {
+            if (view.origin() != kTopLeft_GrSurfaceOrigin) {
                 float tmp = bounds[0];
                 bounds[0] = 1.0f - (inv * bounds[1]);
                 bounds[1] = 1.0f - (inv * tmp);