Remove GP from drawstate, revision of invariant output for GP

src/gpu/effects/GrBitmapTextGeoProc.cpp

Index: src/gpu/effects/GrBitmapTextGeoProc.cpp
diff --git a/src/gpu/effects/GrBitmapTextGeoProc.cpp b/src/gpu/effects/GrBitmapTextGeoProc.cpp
index 1578fd8fe4f35794337efff1c9719ce624ff0e03..e41ace4a3b06958806ef4069bc2725d54cdeea70 100644
--- a/src/gpu/effects/GrBitmapTextGeoProc.cpp
+++ b/src/gpu/effects/GrBitmapTextGeoProc.cpp
@@ -84,14 +84,16 @@ bool GrBitmapTextGeoProc::onIsEqual(const GrGeometryProcessor& other) const {
     return SkToBool(this->inColor()) == SkToBool(gp.inColor());
 }
 
-void GrBitmapTextGeoProc::onComputeInvariantOutput(GrInvariantOutput* inout) const {
+void GrBitmapTextGeoProc::onComputeOutputCoverage(GrInitInvariantOutput* out) const {
     if (GrPixelConfigIsAlphaOnly(this->texture(0)->config())) {
-        inout->mulByUnknownAlpha();
+        out->setUnknownAlpha();
     } else if (GrPixelConfigIsOpaque(this->texture(0)->config())) {
-        inout->mulByUnknownOpaqueColor();
+        out->setOpaque();
+        out->setHasFourComponents();
         inout->setUsingLCDCoverage();
     } else {
-        inout->mulByUnknownColor();
+        out->setUnknown();
+        out->setHasFourComponents();
         inout->setUsingLCDCoverage();
     }
 }