missing header from previous commit

git-svn-id: http://skia.googlecode.com/svn/trunk/include@10748 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/gl/GrGLInterface.h b/gpu/gl/GrGLInterface.h
index 6a51adc..c58c5bc 100644
--- a/gpu/gl/GrGLInterface.h
+++ b/gpu/gl/GrGLInterface.h
@@ -23,11 +23,11 @@
     kNone_GrGLBinding = 0x0,
 
     kDesktop_GrGLBinding = 0x01,
-    kES2_GrGLBinding = 0x02,
+    kES_GrGLBinding = 0x02,  // ES2+ only
 
     // for iteration of GrGLBindings
     kFirstGrGLBinding = kDesktop_GrGLBinding,
-    kLastGrGLBinding = kES2_GrGLBinding
+    kLastGrGLBinding = kES_GrGLBinding
 };
 
 ////////////////////////////////////////////////////////////////////////////////