Add GrProcOptInfo class to track various output information for color and coverage stages.

src/gpu/GrOptDrawState.cpp

Index: src/gpu/GrOptDrawState.cpp
diff --git a/src/gpu/GrOptDrawState.cpp b/src/gpu/GrOptDrawState.cpp
index 7d8b06c129cbb570d45d8622dd4483fcd3a5f47c..6874ea7afc3481dff300cefa7750f7b694f8c2e8 100644
--- a/src/gpu/GrOptDrawState.cpp
+++ b/src/gpu/GrOptDrawState.cpp
@@ -11,7 +11,7 @@
 #include "GrDrawState.h"
 #include "GrDrawTargetCaps.h"
 #include "GrGpu.h"
-#include "GrInvariantOutput.h"
+#include "GrProcOptInfo.h"
 
 GrOptDrawState::GrOptDrawState(const GrDrawState& drawState,
                                BlendOptFlags blendOptFlags,
@@ -239,8 +239,17 @@ void GrOptDrawState::computeEffectiveColorStages(const GrDrawState& ds,
             color = 0;
         }
     }
-    GrInvariantOutput inout(color, flags, false);
-
+    GrProcOptInfo poi;
+    if (ds.numColorStages() > 0) {
+        poi.calcWithInitialValues(&ds.getColorStage(0), ds.numColorStages(), color, flags, false);
+        *firstColorStageIdx = poi.firstEffectiveStageIndex();
+        descInfo->fInputColorIsUsed = poi.inputColorIsUsed();
+        fColor = poi.inputColorToEffectiveStage();
+        if (poi.removeVertexAttrib()) {
+            *fixedFunctionVAToRemove |= 0x1 << kColor_GrVertexAttribBinding;
+        }
+    }
+/*
     for (int i = 0; i < ds.numColorStages(); ++i) {
         const GrFragmentProcessor* fp = ds.getColorStage(i).getProcessor();
         fp->computeInvariantOutput(&inout);
@@ -258,6 +267,7 @@ void GrOptDrawState::computeEffectiveColorStages(const GrDrawState& ds,
             inout.resetNonMulStageFound();
         }
     }
+    */
 }
 
 void GrOptDrawState::computeEffectiveCoverageStages(const GrDrawState& ds,