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

src/gpu/GrOptDrawState.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrOptDrawState_DEFINED
 #define GrOptDrawState_DEFINED
 
@@ skipping 107 matching lines @@
     /// @}
 
     ///////////////////////////////////////////////////////////////////////////
     /// @name ScissorState
     ////
 
     const GrScissorState& getScissorState() const { return fScissorState; }
 
     /// @}
 
-
     ///////////////////////////////////////////////////////////////////////////
     /// @name Boolean Queries
     ////
 
     bool isDitherState() const { return SkToBool(fFlags & kDither_Flag); }
     bool isHWAntialiasState() const { return SkToBool(fFlags & kHWAA_Flag); }
-    bool isColorWriteDisabled() const { return SkToBool(fFlags & kDisableColorWrite_Flag); }
     bool mustSkip() const { return NULL == this->getRenderTarget(); }
 
     /// @}
 
     /**
      * Gets whether the target is drawing clockwise, counterclockwise,
      * or both faces.
      * @return the current draw face(s).
      */
     GrDrawState::DrawFace getDrawFace() const { return fDrawFace; }
@@ skipping 26 matching lines @@
      * Calculates the primary and secondary output types of the shader. For certain output types
      * the function may adjust the blend coefficients. After this function is called the src and dst
      * blend coeffs will represent those used by backend API.
      */
     void setOutputStateInfo(const GrDrawState& ds, GrXferProcessor::OptFlags,
                             const GrDrawTargetCaps&);
 
     enum Flags {
         kDither_Flag            = 0x1,
         kHWAA_Flag              = 0x2,
-        kDisableColorWrite_Flag = 0x4,
     };
 
     typedef GrPendingIOResource<GrRenderTarget, kWrite_GrIOType> RenderTarget;
     typedef SkSTArray<8, GrPendingFragmentStage> FragmentStageArray;
     typedef GrPendingProgramElement<const GrGeometryProcessor> ProgramGeometryProcessor;
     typedef GrPendingProgramElement<const GrPrimitiveProcessor> ProgramPrimitiveProcessor;
     typedef GrPendingProgramElement<const GrXferProcessor> ProgramXferProcessor;
     RenderTarget                        fRenderTarget;
     GrScissorState                      fScissorState;
     SkMatrix                            fViewMatrix;
@@ skipping 12 matching lines @@
 
     // This function is equivalent to the offset into fFragmentStages where coverage stages begin.
     int                                 fNumColorStages;
 
     GrProgramDesc fDesc;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif