Revert of Screenspace AA tessellated path rendering.

src/gpu/GrDefaultGeoProcFactory.h

Index: src/gpu/GrDefaultGeoProcFactory.h
diff --git a/src/gpu/GrDefaultGeoProcFactory.h b/src/gpu/GrDefaultGeoProcFactory.h
index 022930b65991b045e9dba2dbe5fae2431886be2a..f7ddb061fdf57f6d16c342fd544c67bfccf930dd 100644
--- a/src/gpu/GrDefaultGeoProcFactory.h
+++ b/src/gpu/GrDefaultGeoProcFactory.h
@@ -24,7 +24,7 @@
 
     struct PositionCoverageAttr {
         SkPoint fPosition;
-        float   fCoverage;
+        GrColor fCoverage;
     };
 
     struct PositionColorAttr {
@@ -35,7 +35,7 @@
     struct PositionColorCoverageAttr {
         SkPoint fPosition;
         SkColor fColor;
-        float   fCoverage;
+        GrColor fCoverage;
     };
 
     struct PositionLocalCoordAttr {
@@ -46,7 +46,7 @@
     struct PositionLocalCoordCoverageAttr {
         SkPoint fPosition;
         SkPoint fLocalCoord;
-        float   fCoverage;
+        GrColor fCoverage;
     };
 
     struct PositionColorLocalCoordAttr {
@@ -59,7 +59,7 @@
         SkPoint fPosition;
         GrColor fColor;
         SkPoint fLocalCoord;
-        float   fCoverage;
+        GrColor fCoverage;
     };
 
     struct Color {