Add GrEllipseEdgeEffect

src/gpu/GrEffect.cpp

Index: src/gpu/GrEffect.cpp
===================================================================
--- src/gpu/GrEffect.cpp	(revision 7952)
+++ src/gpu/GrEffect.cpp	(working copy)
@@ -90,6 +90,10 @@
     fTextureAccesses.push_back(access);
 }
 
+void GrEffect::addVertexAttribName(const char* name) {
+    fVertexAttribNames.push_back(name);
+}
+
 void* GrEffect::operator new(size_t size) {
     return GrEffect_Globals::GetTLS()->allocate(size);
 }