Draft change to start pulling uniform color into GP

src/gpu/GrOptDrawState.h

Index: src/gpu/GrOptDrawState.h
diff --git a/src/gpu/GrOptDrawState.h b/src/gpu/GrOptDrawState.h
index 876ff52137578fc47a37531d3431629730065161..0c79fc472fd5e84e29ac5432fc9ab84f75ea0d5a 100644
--- a/src/gpu/GrOptDrawState.h
+++ b/src/gpu/GrOptDrawState.h
@@ -35,6 +35,10 @@ public:
                    const GrDrawTargetCaps&, const ScissorState&,
                    const GrDeviceCoordTexture* dstCopy, GrGpu::DrawType);
 
+    /*
+     * the Equality operator may update GrOptDrawState's GrBatchTracker object to subsume that's
+     * GrBatchTracker into this's GrBatchTracker.
+     */
     bool operator== (const GrOptDrawState& that) const;
     bool operator!= (const GrOptDrawState& that) const { return !(*this == that); }
 
@@ -49,18 +53,6 @@ public:
     /// @}
 
     ///////////////////////////////////////////////////////////////////////////
-    /// @name Coverage
-    ////
-
-    uint8_t getCoverage() const { return fCoverage; }
-
-    GrColor getCoverageColor() const {
-        return GrColorPackRGBA(fCoverage, fCoverage, fCoverage, fCoverage);
-    }
-
-    /// @}
-
-    ///////////////////////////////////////////////////////////////////////////
     /// @name Effect Stages
     /// Each stage hosts a GrProcessor. The effect produces an output color or coverage in the
     /// fragment shader. Its inputs are the output from the previous stage as well as some variables
@@ -85,8 +77,10 @@ public:
         return this->numFragmentStages() + (this->hasGeometryProcessor() ? 1 : 0) + 1;
     }
 
+    // TODO remove the GP specific calls when the PathProc can provide the same interface
     bool hasGeometryProcessor() const { return SkToBool(fGeometryProcessor.get()); }
     const GrGeometryProcessor* getGeometryProcessor() const { return fGeometryProcessor.get(); }
+    const GrPrimitiveProcessor* getPrimitiveProcessor() const { return fPrimitiveProcessor.get(); }
     const GrBatchTracker& getBatchTracker() const { return fBatchTracker; }
 
     const GrXferProcessor* getXferProcessor() const { return fXferProcessor.get(); }
@@ -213,13 +207,12 @@ private:
     GrColor                             fColor;
     SkMatrix                            fViewMatrix;
     GrStencilSettings                   fStencilSettings;
-    uint8_t                             fCoverage;
     GrDrawState::DrawFace               fDrawFace;
     GrDeviceCoordTexture                fDstCopy;
     uint32_t                            fFlags;
     ProgramGeometryProcessor            fGeometryProcessor;
     ProgramPrimitiveProcessor           fPrimitiveProcessor;
-    GrBatchTracker                      fBatchTracker;
+    mutable GrBatchTracker              fBatchTracker;
     ProgramXferProcessor                fXferProcessor;
     FragmentStageArray                  fFragmentStages;
     GrGpu::DrawType                     fDrawType;