Revert "Drop support for unused MSAA extensions"

This reverts commit 7df27465c4ecc8a4a0cdd95e9785c342903c2de9.

Reason for revert: experimental revert to see if this is the cause of the tree redness

Original change's description:
> Drop support for unused MSAA extensions
> 
> Bug: skia:
> Change-Id: I113b80e3f991f195155148625ceb29242ea82776
> Reviewed-on: https://skia-review.googlesource.com/101403
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Chris Dalton <csmartdalton@google.com>

TBR=bsalomon@google.com,csmartdalton@google.com,ethannicholas@google.com

Change-Id: I4fa4123e2d176bef88cd76a09a14053d9ac5809f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/101680
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/effects/GrBezierEffect.cpp b/src/gpu/effects/GrBezierEffect.cpp
index 4cc8770..25148cd 100644
--- a/src/gpu/effects/GrBezierEffect.cpp
+++ b/src/gpu/effects/GrBezierEffect.cpp
@@ -81,7 +81,7 @@
     varyingHandler->addVarying("ConicCoeffs", &v);
     vertBuilder->codeAppendf("%s = %s;", v.vsOut(), gp.inConicCoeffs()->fName);
 
-    GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+    GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
     // Setup pass through color
     this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform);
 
@@ -333,7 +333,7 @@
     varyingHandler->addVarying("HairQuadEdge", &v);
     vertBuilder->codeAppendf("%s = %s;", v.vsOut(), gp.inHairQuadEdge()->fName);
 
-    GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+    GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
     // Setup pass through color
     this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform);
 
@@ -534,7 +534,7 @@
     // emit attributes
     varyingHandler->emitAttributes(gp);
 
-    GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+    GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
     // Setup pass through color
     if (!gp.colorIgnored()) {
         this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform);