Add GrEllipseEdgeEffect

src/gpu/gl/GrGLProgram.h

Index: src/gpu/gl/GrGLProgram.h
===================================================================
--- src/gpu/gl/GrGLProgram.h	(revision 7952)
+++ src/gpu/gl/GrGLProgram.h	(working copy)
@@ -165,6 +165,14 @@
             kDualSrcOutputCnt
         };
 
+        struct AttribPair {
+            void set(int index, const char* name) {
+                fIndex = index; fName = name;
+            }
+            int         fIndex;
+            const char* fName;
+        };
+
         // TODO: remove these two members when edge-aa can be rewritten as a GrEffect.
         GrDrawState::VertexEdgeType fVertexEdgeType;
         // should the FS discard if the edge-aa coverage is zero (to avoid stencil manipulation)
@@ -194,6 +202,8 @@
         int8_t                      fEdgeAttributeIndex;
         int8_t                      fTexCoordAttributeIndex;
 
+        SkSTArray<2, AttribPair, true> fEffectAttributes;
+
         friend class GrGLProgram;
     };