Make non-AA hairline stroke rects snap to pixels centers so they close.

src/gpu/GrClipMaskManager.cpp

Index: src/gpu/GrClipMaskManager.cpp
diff --git a/src/gpu/GrClipMaskManager.cpp b/src/gpu/GrClipMaskManager.cpp
index 078895d7e3e8f216854b62099909df5fc22896a4..a70fb3a8ee5f448cd73593306f17c112591c39bb 100644
--- a/src/gpu/GrClipMaskManager.cpp
+++ b/src/gpu/GrClipMaskManager.cpp
@@ -747,7 +747,7 @@ bool GrClipMaskManager::createStencilClipMask(GrRenderTarget* rt,
 
             // if the target is MSAA then we want MSAA enabled when the clip is soft
             if (rt->isMultisampled()) {
-                pipelineBuilder.setState(GrPipelineBuilder::kHWAntialias_StateBit, element->isAA());
+                pipelineBuilder.setState(GrPipelineBuilder::kHWAntialias_Flag, element->isAA());
             }
 
             bool fillInverted = false;