added support for PLS path rendering

src/gpu/batches/GrDrawAtlasBatch.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 GrDrawAtlasBatch_DEFINED
 #define GrDrawAtlasBatch_DEFINED
 
@@ skipping 21 matching lines @@
     void computePipelineOptimizations(GrInitInvariantOutput* color, 
                                       GrInitInvariantOutput* coverage,
                                       GrBatchToXPOverrides* overrides) const override {
         // When this is called on a batch, there is only one geometry bundle
         if (this->hasColors()) {
             color->setUnknownFourComponents();
         } else {
             color->setKnownFourComponents(fGeoData[0].fColor);
         }
         coverage->setKnownSingleComponent(0xff);
-        overrides->fUsePLSDstRead = false;
     }
 
     SkSTArray<1, Geometry, true>* geoData() { return &fGeoData; }
 
 private:
     void onPrepareDraws(Target*) const override;
 
     void initBatchTracker(const GrXPOverridesForBatch&) override;
 
     GrDrawAtlasBatch(const Geometry& geometry, const SkMatrix& viewMatrix, int spriteCount,
@@ skipping 13 matching lines @@
     GrColor  fColor;
     int      fQuadCount;
     bool     fColorIgnored;
     bool     fCoverageIgnored;
     bool     fHasColors;
 
     typedef GrVertexBatch INHERITED;
 };
 
 #endif