Add mixed samples support to XPs

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 "GrCaps.h"
 #include "GrBatch.h"
 #include "GrGpu.h"
 #include "GrPipelineBuilder.h"
 #include "GrProcOptInfo.h"
 #include "GrXferProcessor.h"
 
 GrPipeline::GrPipeline(const GrPipelineBuilder& pipelineBuilder,
                        const GrProcOptInfo& colorPOI,
                        const GrProcOptInfo& coveragePOI,
                        const GrCaps& caps,
                        const GrScissorState& scissorState,
                        const GrXferProcessor::DstTexture* dstTexture) {
     // Create XferProcessor from DS's XPFactory
     SkAutoTUnref<GrXferProcessor> xferProcessor(
         pipelineBuilder.getXPFactory()->createXferProcessor(
-            colorPOI, coveragePOI, dstTexture, caps));
+            colorPOI, coveragePOI, pipelineBuilder.hasMixedSamples(), dstTexture, caps));
 
     GrColor overrideColor = GrColor_ILLEGAL;
     if (colorPOI.firstEffectiveStageIndex() != 0) {
         overrideColor = colorPOI.inputColorToEffectiveStage();
     }
 
     GrXferProcessor::OptFlags optFlags;
     if (xferProcessor) {
         fXferProcessor.reset(xferProcessor.get());
 
@@ skipping 117 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;
 }