Draft change to start pulling uniform color into GP

src/gpu/GrProcOptInfo.cpp

Index: src/gpu/GrProcOptInfo.cpp
diff --git a/src/gpu/GrProcOptInfo.cpp b/src/gpu/GrProcOptInfo.cpp
index 4c119b5cb3e2bbd1cca64017757b574d4bfcf4bd..6fad760071dd9b9b20e60dbd317e4e0e85cbab8f 100644
--- a/src/gpu/GrProcOptInfo.cpp
+++ b/src/gpu/GrProcOptInfo.cpp
@@ -48,7 +48,6 @@ void GrProcOptInfo::internalCalc(const GrFragmentStage* stages,
     fFirstEffectStageIndex = 0;
     fInputColorIsUsed = true;
     fInputColor = fInOut.color();
-    fRemoveVertexAttrib = false;
     fReadsDst = false;
     fReadsFragPosition = initWillReadFragmentPosition;
 
@@ -74,7 +73,6 @@ void GrProcOptInfo::internalCalc(const GrFragmentStage* stages,
             fFirstEffectStageIndex = i + 1;
             fInputColor = fInOut.color();
             fInputColorIsUsed = true;
-            fRemoveVertexAttrib = true;
             // Since we are clearing all previous color stages we are in a state where we have found
             // zero stages that don't multiply the inputColor.
             fInOut.resetNonMulStageFound();