Don't batch large instanced rects with other shapes

src/gpu/instanced/InstancedRendering.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 gr_instanced_InstancedRendering_DEFINED
 #define gr_instanced_InstancedRendering_DEFINED
 
@@ skipping 110 matching lines @@
 
         void computePipelineOptimizations(GrInitInvariantOutput* color,
                                           GrInitInvariantOutput* coverage,
                                           GrBatchToXPOverrides*) const override;
 
         void onPrepare(GrBatchFlushState*) override {}
         void onDraw(GrBatchFlushState*) override;
 
         InstancedRendering* const         fInstancedRendering;
         BatchInfo                         fInfo;
+        SkScalar                          fPixelLoad;
         SkSTArray<5, ParamsTexel, true>   fParams;
         bool                              fIsTracked;
         int                               fNumDraws;
         int                               fNumChangesInGeometry;
         Draw*                             fHeadDraw;
         Draw*                             fTailDraw;
 
         typedef GrDrawBatch INHERITED;
 
         friend class InstancedRendering;
@@ skipping 36 matching lines @@
     SkSTArray<1024, ParamsTexel, true>   fParams;
     BatchList                            fTrackedBatches;
     SkAutoTUnref<const GrBuffer>         fVertexBuffer;
     SkAutoTUnref<const GrBuffer>         fIndexBuffer;
     SkAutoTUnref<GrBuffer>               fParamsBuffer;
 };
 
 }
 
 #endif