Add onGetBlendInfo to GrXferProcessor

src/gpu/GrPipeline.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 "GrPipeline.h"
 
 #include "GrBatch.h"
@@ skipping 53 matching lines @@
     if (pipelineBuilder.isDither()) {
         fFlags |= kDither_Flag;
     }
 
     int firstColorStageIdx = colorPOI.firstEffectiveStageIndex();
 
     // TODO: Once we can handle single or four channel input into coverage stages then we can use
     // GrPipelineBuilder's coverageProcInfo (like color above) to set this initial information.
     int firstCoverageStageIdx = 0;
 
-    GrXferProcessor::BlendInfo blendInfo;
-    fXferProcessor->getBlendInfo(&blendInfo);
-
     this->adjustProgramFromOptimizations(pipelineBuilder, optFlags, colorPOI, coveragePOI,
                                          &firstColorStageIdx, &firstCoverageStageIdx);
 
     bool usesLocalCoords = false;
 
     // Copy Stages from PipelineBuilder to Pipeline
     for (int i = firstColorStageIdx; i < pipelineBuilder.numColorFragmentStages(); ++i) {
         SkNEW_APPEND_TO_TARRAY(&fFragmentStages,
                                GrPendingFragmentStage,
                                (pipelineBuilder.fColorStages[i]));
@@ skipping 66 matching lines @@
     SkASSERT(this->numFragmentStages() == that.numFragmentStages());
     for (int i = 0; i < this->numFragmentStages(); i++) {
 
         if (this->getFragmentStage(i) != that.getFragmentStage(i)) {
             return false;
         }
     }
     return true;
 }