Stop supporting HW dither

src/gpu/GrPipelineBuilder.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrPipelineBuilder.h"
 
 #include "GrBlend.h"
@@ skipping 24 matching lines @@
 
     this->setRenderTarget(rt);
 
     // These have no equivalent in GrPaint, set them to defaults
     fDrawFace = kBoth_DrawFace;
     fStencilSettings.setDisabled();
     fFlags = 0;
 
     fClip = clip;
 
-    this->setState(GrPipelineBuilder::kDither_Flag, paint.isDither());
     this->setState(GrPipelineBuilder::kHWAntialias_Flag,
                    rt->isUnifiedMultisampled() && paint.isAntiAlias());
 }
 
 //////////////////////////////////////////////////////////////////////////////s
 
 bool GrPipelineBuilder::willXPNeedDstTexture(const GrCaps& caps,
                                              const GrProcOptInfo& colorPOI,
                                              const GrProcOptInfo& coveragePOI) const {
     return this->getXPFactory()->willNeedDstTexture(caps, colorPOI, coveragePOI,
@@ skipping 43 matching lines @@
 void GrPipelineBuilder::calcColorInvariantOutput(const GrDrawBatch* batch) const {
     fColorProcInfo.calcColorWithBatch(batch, fColorFragmentProcessors.begin(),
                                       this->numColorFragmentProcessors());
 }
 
 void GrPipelineBuilder::calcCoverageInvariantOutput(const GrDrawBatch* batch) const {
     fCoverageProcInfo.calcCoverageWithBatch(batch, fCoverageFragmentProcessors.begin(),
                                             this->numCoverageFragmentProcessors());
 }