Add XP to handle the cases where we disable color write.

src/gpu/GrPaint.cpp

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrPaint.h"
 
@@ skipping 23 matching lines @@
 
 bool GrPaint::isOpaqueAndConstantColor(GrColor* color) const {
     GrProcOptInfo coverageProcInfo;
     coverageProcInfo.calcWithInitialValues(fCoverageStages.begin(), this->numCoverageStages(),
                                            0xFFFFFFFF, kRGBA_GrColorComponentFlags, true);
     GrProcOptInfo colorProcInfo;
     colorProcInfo.calcWithInitialValues(fColorStages.begin(), this->numColorStages(), fColor,
                                         kRGBA_GrColorComponentFlags, false);
 
     GrXPFactory::InvariantOutput output;
-    fXPFactory->getInvariantOutput(colorProcInfo, coverageProcInfo, true, &output);
+    fXPFactory->getInvariantOutput(colorProcInfo, coverageProcInfo, &output);
 
     if (kRGBA_GrColorComponentFlags == output.fBlendedColorFlags &&
         0xFF == GrColorUnpackA(output.fBlendedColor)) {
         *color = output.fBlendedColor;
         return true;
     }
     return false;
 }
 
 void GrPaint::resetStages() {
     fColorStages.reset();
     fCoverageStages.reset();
     fXPFactory.reset(GrPorterDuffXPFactory::Create(SkXfermode::kSrc_Mode));
 }