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

src/gpu/GrClipMaskManager.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrClipMaskManager.h"
 #include "GrAAConvexPathRenderer.h"
 #include "GrAAHairLinePathRenderer.h"
@@ skipping 675 matching lines @@
                                       rt);
 
         // walk through each clip element and perform its set op
         // with the existing clip.
         for (GrReducedClip::ElementList::Iter iter(elements.headIter()); iter.get(); iter.next()) {
             const Element* element = iter.get();
 
             GrDrawState drawState(matrix);
             drawState.setRenderTarget(rt);
             drawState.enableState(GrDrawState::kClip_StateBit);
-            drawState.enableState(GrDrawState::kNoColorWrites_StateBit);
+
+            drawState.setDisableColorXPFactory();
 
             // if the target is MSAA then we want MSAA enabled when the clip is soft
             if (rt->isMultisampled()) {
                 drawState.setState(GrDrawState::kHWAntialias_StateBit, element->isAA());
             }
 
             bool fillInverted = false;
             // enabled at bottom of loop
             fClipMode = kIgnoreClip_StencilClipMode;
 
@@ skipping 351 matching lines @@
 }
 
 void GrClipMaskManager::adjustPathStencilParams(const GrStencilBuffer* stencilBuffer,
                                                 GrStencilSettings* settings) {
     // TODO: dynamically attach a stencil buffer
     if (stencilBuffer) {
         int stencilBits = stencilBuffer->bits();
         this->adjustStencilParams(settings, fClipMode, stencilBits);
     }
 }