Migrate Object.prototype.valueOf to CSA

src/js/v8natives.js

Index: src/js/v8natives.js
diff --git a/src/js/v8natives.js b/src/js/v8natives.js
index 29f9c45efa854360c259e620da1209d0a511e372..79a2fb761ed5ff57aaa3d7ee4a54e3b8c1de6c6d 100644
--- a/src/js/v8natives.js
+++ b/src/js/v8natives.js
@@ -31,12 +31,6 @@ function ObjectToLocaleString() {
 }
 
 
-// ES6 19.1.3.7 Object.prototype.valueOf()
-function ObjectValueOf() {
-  return TO_OBJECT(this);
-}
-
-
 // ES6 19.1.3.3 Object.prototype.isPrototypeOf(V)
 function ObjectIsPrototypeOf(V) {
   if (!IS_RECEIVER(V)) return false;
@@ -76,7 +70,7 @@ function ObjectConstructor(x) {
 utils.InstallFunctions(GlobalObject.prototype, DONT_ENUM, [
   "toString", ObjectToString,
   "toLocaleString", ObjectToLocaleString,
-  "valueOf", ObjectValueOf,
+  // valueOf is added in bootstrapper.cc.
   "isPrototypeOf", ObjectIsPrototypeOf,
   // propertyIsEnumerable is added in bootstrapper.cc.
   // __defineGetter__ is added in bootstrapper.cc.
@@ -113,8 +107,4 @@ utils.Export(function(to) {
   to.ObjectHasOwnProperty = GlobalObject.prototype.hasOwnProperty;
 });
 
-%InstallToContext([
-  "object_value_of", ObjectValueOf,
-]);
-
 })