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 f408d2dfec51800d3c664fbf96e716ee444ed428..25d7fb28d9192f8dba1c0c4adc7821d21147873a 100755
--- a/src/gpu/effects/GrDistanceFieldTextureEffect.cpp
+++ b/src/gpu/effects/GrDistanceFieldTextureEffect.cpp
@@ -206,8 +206,8 @@ bool GrDistanceFieldTextureEffect::onIsEqual(const GrGeometryProcessor& other) c
            fFlags == cte.fFlags;
 }
 
-void GrDistanceFieldTextureEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
-    inout->mulByUnknownAlpha();
+void GrDistanceFieldTextureEffect::onComputeOutputCoverage(GrInitInvariantOutput* out) const {
+    out->setUnknown();
 }
 
 void GrDistanceFieldTextureEffect::getGLProcessorKey(const GrBatchTracker& bt,
@@ -407,8 +407,8 @@ bool GrDistanceFieldNoGammaTextureEffect::onIsEqual(const GrGeometryProcessor& o
     return fFlags == cte.fFlags;
 }
 
-void GrDistanceFieldNoGammaTextureEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
-    inout->mulByUnknownAlpha();
+void GrDistanceFieldNoGammaTextureEffect::onComputeOutputCoverage(GrInitInvariantOutput* out) const{
+    out->setUnknown();
 }
 
 void GrDistanceFieldNoGammaTextureEffect::getGLProcessorKey(const GrBatchTracker& bt,
@@ -665,8 +665,9 @@ bool GrDistanceFieldLCDTextureEffect::onIsEqual(const GrGeometryProcessor& other
             fFlags == cte.fFlags);
 }
 
-void GrDistanceFieldLCDTextureEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const {
-    inout->mulByUnknownColor();
+void GrDistanceFieldLCDTextureEffect::onComputeOutputCoverage(GrInitInvariantOutput* out) const {
+    out->setUnknown();
+    out->setHasFourComponents();
     inout->setUsingLCDCoverage();
 }