added support for PLS path rendering

src/gpu/batches/GrTInstanceBatch.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTInstanceBatch_DEFINED
 #define GrTInstanceBatch_DEFINED
 
@@ skipping 47 matching lines @@
         str.append(INHERITED::dumpInfo());
         return str;
     }
 
     void computePipelineOptimizations(GrInitInvariantOutput* color, 
                                       GrInitInvariantOutput* coverage,
                                       GrBatchToXPOverrides* overrides) const override {
         // When this is called on a batch, there is only one geometry bundle
         color->setKnownFourComponents(fGeoData[0].fColor);
         Impl::InitInvariantOutputCoverage(coverage);
-        overrides->fUsePLSDstRead = false;
     }
 
     void initBatchTracker(const GrXPOverridesForBatch& overrides) override {
         overrides.getOverrideColorIfSet(&fGeoData[0].fColor);
         fOverrides = overrides;
     }
 
     SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }
 
     // After seeding, the client should call init() so the Batch can initialize itself
@@ skipping 66 matching lines @@
         return true;
     }
 
     GrXPOverridesForBatch fOverrides;
     SkSTArray<1, Geometry, true> fGeoData;
 
     typedef GrVertexBatch INHERITED;
 };
 
 #endif