Add Coverage Drawing XP

src/gpu/GrOptDrawState.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrOptDrawState.h"
 
 #include "GrDrawState.h"
@@ skipping 37 matching lines @@
     if (colorPOI.firstEffectiveStageIndex() != 0) {
         overrideColor = colorPOI.inputColorToEffectiveStage();
     }
 
     GrXferProcessor::OptFlags optFlags;
     if (xferProcessor) {
         fXferProcessor.reset(xferProcessor.get());
 
         optFlags = xferProcessor->getOptimizations(colorPOI,
                                                    coveragePOI,
-                                                   drawState.isCoverageDrawing(),
                                                    drawState.isColorWriteDisabled(),
                                                    drawState.getStencil().doesWrite(),
                                                    &overrideColor,
                                                    caps);
     }
 
     // When path rendering the stencil settings are not always set on the draw state
     // so we must check the draw type. In cases where we will skip drawing we simply return a
     // null GrOptDrawState.
     if (!xferProcessor || ((GrXferProcessor::kSkipDraw_OptFlag & optFlags) &&
@@ skipping 138 matching lines @@
         if (this->getFragmentStage(i) != that.getFragmentStage(i)) {
             return false;
         }
     }
 
     // Now update the GrPrimitiveProcessor's batch tracker
     fPrimitiveProcessor->makeEqual(&fBatchTracker, that.getBatchTracker());
     return true;
 }