Revert of Revert of Move DstCopy on gpu into the GrXferProcessor.

src/gpu/GrPipeline.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrPipeline_DEFINED
 #define GrPipeline_DEFINED
 
@@ skipping 114 matching lines @@
      * Gets whether the target is drawing clockwise, counterclockwise,
      * or both faces.
      * @return the current draw face(s).
      */
     GrPipelineBuilder::DrawFace getDrawFace() const { return fDrawFace; }
 
     /// @}
 
     ///////////////////////////////////////////////////////////////////////////
 
-    const GrDeviceCoordTexture* getDstCopy() const { return fDstCopy.texture() ? &fDstCopy : NULL; }
-
-    const GrProgramDesc::DescInfo& descInfo() const { return fDescInfo; }
+    bool readsFragPosition() const { return fReadsFragPosition; }
 
     const GrPipelineInfo& getInitBatchTracker() const { return fInitBT; }
 
 private:
     // TODO we can have one constructor once GrBatch is complete
     void internalConstructor(const GrPipelineBuilder&,
                              const GrProcOptInfo& colorPOI,
                              const GrProcOptInfo& coveragePOI,
                              const GrDrawTargetCaps&,
                              const GrScissorState&,
@@ skipping 22 matching lines @@
         kHWAA_Flag              = 0x2,
     };
 
     typedef GrPendingIOResource<GrRenderTarget, kWrite_GrIOType> RenderTarget;
     typedef SkSTArray<8, GrPendingFragmentStage> FragmentStageArray;
     typedef GrPendingProgramElement<const GrXferProcessor> ProgramXferProcessor;
     RenderTarget                        fRenderTarget;
     GrScissorState                      fScissorState;
     GrStencilSettings                   fStencilSettings;
     GrPipelineBuilder::DrawFace         fDrawFace;
-    GrDeviceCoordTexture                fDstCopy;
     uint32_t                            fFlags;
     ProgramXferProcessor                fXferProcessor;
     FragmentStageArray                  fFragmentStages;
-    GrProgramDesc::DescInfo             fDescInfo;
+    bool                                fReadsFragPosition;
     GrPipelineInfo                      fInitBT;
 
     // This function is equivalent to the offset into fFragmentStages where coverage stages begin.
     int                                 fNumColorStages;
 
     GrProgramDesc fDesc;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif