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..60a78d0ca986d52be9628a1b6a54880d3ddc7017 100644
--- a/src/js/v8natives.js
+++ b/src/js/v8natives.js
@@ -11,7 +11,6 @@
 
 var GlobalObject = global.Object;
 var iteratorSymbol = utils.ImportNow("iterator_symbol");
-var NaN = %GetRootNaN();

[Yang, 2017/03/02 06:55:12]

Do we still need the runtime function for this too? This seems unrelated. So
maybe split this into a separate CL?

[rongjie, 2017/03/02 07:29:15]

I forgot to remove this in https://codereview.chromium.org/2715793004/, will
split this into new CL.

 var ObjectToString = utils.ImportNow("object_to_string");
 
 // ----------------------------------------------------------------------------
@@ -31,12 +30,6 @@ 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 +69,7 @@ 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 +106,4 @@ utils.Export(function(to) {
   to.ObjectHasOwnProperty = GlobalObject.prototype.hasOwnProperty;
 });
 
-%InstallToContext([
-  "object_value_of", ObjectValueOf,
-]);
-
 })