Add flag for window rectangles to GrRenderTarget

include/private/GrInstancedPipelineInfo.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGrInstancedPipelineInfo_DEFINED
 #define GrGrInstancedPipelineInfo_DEFINED
 
 #include "GrRenderTarget.h"
 
 /**
  * Provides info about the pipeline that GrInstancedRendering needs in order to select appropriate
  * drawing algorithms.
  */
 struct GrInstancedPipelineInfo {
     GrInstancedPipelineInfo(const GrRenderTarget* rt)
         : fIsMultisampled(rt->isStencilBufferMultisampled()),
-          fIsMixedSampled(rt->hasMixedSamples()),
+          fIsMixedSampled(rt->isMixedSampled()),
           fIsRenderingToFloat(GrPixelConfigIsFloatingPoint(rt->desc().fConfig)),
           fColorDisabled(false),
           fDrawingShapeToStencil(false),
           fCanDiscard(false) {
     }
 
     bool canUseCoverageAA() const {
         return !fIsMultisampled || (fIsMixedSampled && !fDrawingShapeToStencil);
     }
 
     bool fIsMultisampled         : 1;
     bool fIsMixedSampled         : 1;
     bool fIsRenderingToFloat     : 1;
     bool fColorDisabled          : 1;
     /**
      * Indicates that the instanced renderer should take extra precautions to ensure the shape gets
      * drawn correctly to the stencil buffer (e.g. no coverage AA). NOTE: this does not mean a
      * stencil test is or is not active.
      */
     bool fDrawingShapeToStencil  : 1;
     /**
      * Indicates that the instanced renderer can use processors with discard instructions. This
      * should not be set if the shader will use derivatives, automatic mipmap LOD, or other features
      * that depend on neighboring pixels. Some draws will fail to create if this is not set.
      */
     bool fCanDiscard             : 1;
 };
 
 #endif