Add GrEllipseEdgeEffect

src/gpu/GrDrawState.h

Index: src/gpu/GrDrawState.h
===================================================================
--- src/gpu/GrDrawState.h	(revision 7952)
+++ src/gpu/GrDrawState.h	(working copy)
@@ -488,6 +488,10 @@
         return effect;
     }
 
+    void setEffectAttribIndices(int stageIdx, const int indices[], int count) {
+        fStages[stageIdx].setVertexAttribIndices(indices, count);
+    }
+
     /**
      * Creates a GrSimpleTextureEffect.
      */
@@ -514,7 +518,10 @@
         return true;
     }
 
-    void disableStage(int stageIdx) { this->setEffect(stageIdx, NULL); }
+    void disableStage(int stageIdx) { 
+        this->setEffect(stageIdx, NULL); 
+        this->setEffectAttribIndices(stageIdx, NULL, 0);
+    }
 
     /**
      * Release all the GrEffects referred to by this draw state.
@@ -1021,9 +1028,6 @@
         /* Circle specified as center_x, center_y, outer_radius, inner_radius
            all in window space (y-down). */
         kCircle_EdgeType,
-        /* Axis-aligned ellipse specified as center_x, center_y, x_radius, x_radius/y_radius
-           all in window space (y-down). */
-        kEllipse_EdgeType,
 
         kVertexEdgeTypeCnt
     };