Add flag for window rectangles to GrRenderTarget

include/gpu/GrDrawContext.h

Index: include/gpu/GrDrawContext.h
diff --git a/include/gpu/GrDrawContext.h b/include/gpu/GrDrawContext.h
index 6b582a6a631b6c76d4e394034089845958306d26..def541d9a9814c0aeaa72ec897fa74f243edc96c 100644
--- a/include/gpu/GrDrawContext.h
+++ b/include/gpu/GrDrawContext.h
@@ -263,7 +263,7 @@ public:
         return fRenderTarget->isStencilBufferMultisampled();
     }
     bool isUnifiedMultisampled() const { return fRenderTarget->isUnifiedMultisampled(); }
-    bool hasMixedSamples() const { return fRenderTarget->hasMixedSamples(); }
+    bool hasMixedSamples() const { return fRenderTarget->isMixedSampled(); }
 
     bool mustUseHWAA(const GrPaint& paint) const {
         return paint.isAntiAlias() && fRenderTarget->isUnifiedMultisampled();