Add requireHWAA param to GrPipelineBuilder constructor

src/gpu/GrPipelineBuilder.cpp

Index: src/gpu/GrPipelineBuilder.cpp
diff --git a/src/gpu/GrPipelineBuilder.cpp b/src/gpu/GrPipelineBuilder.cpp
index 252c26577e5f15c65349b1cd87cde0b5772911d6..02aef16db73c9aca0f1778314ea3ac4bb1599b71 100644
--- a/src/gpu/GrPipelineBuilder.cpp
+++ b/src/gpu/GrPipelineBuilder.cpp
@@ -20,7 +20,9 @@ GrPipelineBuilder::GrPipelineBuilder()
     SkDEBUGCODE(fBlockEffectRemovalCnt = 0;)
 }
 
-GrPipelineBuilder::GrPipelineBuilder(const GrPaint& paint, GrRenderTarget* rt, const GrClip& clip) {
+GrPipelineBuilder::GrPipelineBuilder(const GrPaint& paint, GrRenderTarget* rt, const GrClip& clip,
+                                     bool requireHWAA) {
+    SkASSERT(!requireHWAA || (rt->isStencilBufferMultisampled() && paint.isAntiAlias()));
     SkDEBUGCODE(fBlockEffectRemovalCnt = 0;)
 
     for (int i = 0; i < paint.numColorFragmentProcessors(); ++i) {
@@ -43,7 +45,7 @@ GrPipelineBuilder::GrPipelineBuilder(const GrPaint& paint, GrRenderTarget* rt, c
     fClip = clip;
 
     this->setState(GrPipelineBuilder::kHWAntialias_Flag,
-                   rt->isUnifiedMultisampled() && paint.isAntiAlias());
+                   requireHWAA || (rt->isUnifiedMultisampled() && paint.isAntiAlias()));
     this->setState(GrPipelineBuilder::kDisableOutputConversionToSRGB_Flag,
                    paint.getDisableOutputConversionToSRGB());
     this->setState(GrPipelineBuilder::kAllowSRGBInputs_Flag,