Make sure FunctionToMethod is lazily compiled.

src/harmony-classes.js

Index: src/harmony-classes.js
diff --git a/src/harmony-classes.js b/src/harmony-classes.js
index 31c62611ef525cc26353dd56b5b8075f135fd939..ac0675862eacf581136d743163e74b3d67ea2b01 100644
--- a/src/harmony-classes.js
+++ b/src/harmony-classes.js
@@ -9,26 +9,27 @@
 
 "use strict";
 
+function FunctionToMethod(homeObject) {
+  if (!IS_SPEC_FUNCTION(this)) {
+    throw MakeTypeError('toMethod_non_function',
+                        [%ToString(this), typeof this]);
 
-(function() {
-  function FunctionToMethod(homeObject) {
-    if (!IS_SPEC_FUNCTION(this)) {
-      throw MakeTypeError('toMethod_non_function',
-                          [%ToString(this), typeof this]);
-
-    }
-
-    if (!IS_SPEC_OBJECT(homeObject)) {
-      throw MakeTypeError('toMethod_non_object',
-                          [%ToString(homeObject)]);
-    }
+  }
 
-    return %ToMethod(this, homeObject);
+  if (!IS_SPEC_OBJECT(homeObject)) {
+    throw MakeTypeError('toMethod_non_object',
+                        [%ToString(homeObject)]);
   }
 
+  return %ToMethod(this, homeObject);
+}
+
+function SetupHarmonyClasses() {
   %CheckIsBootstrapping();
 
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
       "toMethod", FunctionToMethod
   ));
-}());
+}
+
+SetupHarmonyClasses();