Add GrEllipseEdgeEffect

src/gpu/gl/GrGLShaderBuilder.h

Index: src/gpu/gl/GrGLShaderBuilder.h
===================================================================
--- src/gpu/gl/GrGLShaderBuilder.h	(revision 7952)
+++ src/gpu/gl/GrGLShaderBuilder.h	(working copy)
@@ -146,7 +146,10 @@
         return this->getUniformVariable(u).c_str();
     }
 
-    /** Add a varying variable to the current program to pass values between vertex and fragment
+   /** Add a vertex attribute to the current program that is passed in from the vertex data */
+    void addAttribute(GrSLType type, const char* name);
+
+   /** Add a varying variable to the current program to pass values between vertex and fragment
         shaders. If the last two parameters are non-NULL, they are filled in with the name
         generated. */
     void addVarying(GrSLType type,