Revert "Reland "Remove antialiasing control from GrPaint.""

This reverts commit 3944484020d98ff8f386378296106c321279482b.

Reason for revert: Merges badly with a recent change. Will rebase and reland.

Original change's description:
> Reland "Remove antialiasing control from GrPaint."
> 
> This contains fixes for GLPrograms test and mixed samples rendering.
> 
> This reverts commit 419d81eed4a010e6080db199795117cbedf9e6e4.
> 
> BUG=skia:
> 
> Change-Id: If8f002fbfaaaab6d1607403f2b15ccc7f1e17e87
> Reviewed-on: https://skia-review.googlesource.com/5763
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> 

TBR=bsalomon@google.com,robertphillips@google.com,reviews@skia.org
BUG=skia:
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: Iff9657041e28604a845bc5a9acec7c9b248c53bd
Reviewed-on: https://skia-review.googlesource.com/5772
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index ff5b026..34b9abf 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -366,7 +366,7 @@
             paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
             paint.setAllowSRGBInputs(true);
             SkRect rect = SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height));
-            renderTargetContext->drawRect(GrNoClip(), paint, GrAA::kNo, matrix, rect, nullptr);
+            renderTargetContext->drawRect(GrNoClip(), paint, matrix, rect, nullptr);
 
             if (kFlushWrites_PixelOp & pixelOpsFlags) {
                 this->flushSurfaceWrites(surface);
@@ -486,7 +486,7 @@
                 paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
                 paint.setAllowSRGBInputs(true);
                 SkRect rect = SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height));
-                tempRTC->drawRect(GrNoClip(), paint, GrAA::kNo, SkMatrix::I(), rect, nullptr);
+                tempRTC->drawRect(GrNoClip(), paint, SkMatrix::I(), rect, nullptr);
                 surfaceToRead.reset(tempRTC->asTexture().release());
                 left = 0;
                 top = 0;