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>
diff --git a/src/gpu/effects/generated/GrMagnifierEffect.cpp b/src/gpu/effects/generated/GrMagnifierEffect.cpp
index a6522b5..5a29834 100644
--- a/src/gpu/effects/generated/GrMagnifierEffect.cpp
+++ b/src/gpu/effects/generated/GrMagnifierEffect.cpp
@@ -85,8 +85,8 @@
             pdman.set1f(xInvInsetVar, (_outer.xInvInset));
             pdman.set1f(yInvInsetVar, (_outer.yInvInset));
         }
-        const GrSurfaceProxyView& srcView = _outer.textureSampler(0).view();
-        GrTexture& src = *srcView.proxy()->peekTexture();
+        GrSurfaceProxy& srcProxy = *_outer.textureSampler(0).proxy();
+        GrTexture& src = *srcProxy.peekTexture();
         (void)src;
         auto bounds = _outer.bounds;
         (void)bounds;
@@ -110,7 +110,7 @@
 
         {
             SkScalar y = srcRect.y() * invH;
-            if (srcView.origin() != kTopLeft_GrSurfaceOrigin) {
+            if (srcProxy.origin() != kTopLeft_GrSurfaceOrigin) {
                 y = 1.0f - (srcRect.height() / bounds.height()) - y;
             }
 
@@ -120,7 +120,7 @@
         {
             SkScalar y = bounds.y() * invH;
             SkScalar hSign = 1.f;
-            if (srcView.origin() != kTopLeft_GrSurfaceOrigin) {
+            if (srcProxy.origin() != kTopLeft_GrSurfaceOrigin) {
                 y = 1.0f - bounds.y() * invH;
                 hSign = -1.f;
             }