Revert of Remove GP from drawstate, revision of invariant output for GP

src/gpu/effects/GrDistanceFieldTextureEffect.cpp

Index: src/gpu/effects/GrDistanceFieldTextureEffect.cpp
diff --git a/src/gpu/effects/GrDistanceFieldTextureEffect.cpp b/src/gpu/effects/GrDistanceFieldTextureEffect.cpp
index be06c1dbc41d2303170c2df326ddfeadbdbfeff7..f408d2dfec51800d3c664fbf96e716ee444ed428 100755
--- a/src/gpu/effects/GrDistanceFieldTextureEffect.cpp
+++ b/src/gpu/effects/GrDistanceFieldTextureEffect.cpp
@@ -206,8 +206,8 @@
            fFlags == cte.fFlags;
 }
 
-void GrDistanceFieldTextureEffect::onGetInvariantOutputCoverage(GrInitInvariantOutput* out) const {
-    out->setUnknownSingleComponent();
+void GrDistanceFieldTextureEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
+    inout->mulByUnknownAlpha();
 }
 
 void GrDistanceFieldTextureEffect::getGLProcessorKey(const GrBatchTracker& bt,
@@ -407,8 +407,8 @@
     return fFlags == cte.fFlags;
 }
 
-void GrDistanceFieldNoGammaTextureEffect::onGetInvariantOutputCoverage(GrInitInvariantOutput* out) const{
-    out->setUnknownSingleComponent();
+void GrDistanceFieldNoGammaTextureEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
+    inout->mulByUnknownAlpha();
 }
 
 void GrDistanceFieldNoGammaTextureEffect::getGLProcessorKey(const GrBatchTracker& bt,
@@ -665,9 +665,9 @@
             fFlags == cte.fFlags);
 }
 
-void GrDistanceFieldLCDTextureEffect::onGetInvariantOutputCoverage(GrInitInvariantOutput* out) const {
-    out->setUnknownFourComponents();
-    out->setUsingLCDCoverage();
+void GrDistanceFieldLCDTextureEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
+    inout->mulByUnknownColor();
+    inout->setUsingLCDCoverage();
 }
 
 void GrDistanceFieldLCDTextureEffect::getGLProcessorKey(const GrBatchTracker& bt,