[runtime] [proxy] removing JSFunctionProxy and related code.

src/js/v8natives.js

Index: src/js/v8natives.js
diff --git a/src/js/v8natives.js b/src/js/v8natives.js
index 45e1ec2f3947117f8c71b4b4f9631902085e518f..ca5b34760f22193946b688d9b73decafd2094602 100644
--- a/src/js/v8natives.js
+++ b/src/js/v8natives.js
@@ -1542,9 +1542,7 @@ function NativeCodeFunctionSourceString(func) {
 }
 
 function FunctionSourceString(func) {
-  while (%IsJSFunctionProxy(func)) {
-    func = %GetCallTrap(func);
-  }
+  //TODO(cbruni): resolve func to a non-proxy function for printing

[Toon Verwaest, 2015/12/03 11:48:42]

The spec for Function.prototype.toString says only builtin functions and objects
with [[ECMAScriptCode]] are handled; so only real functions, not proxies. In all
other cases we throw a type error. Hence this comment isn't necessary.
IS_FUNCTION will return true for generators and jsfunctions (including builtins)
which is what we want.

[Camillo Bruni, 2015/12/03 12:18:26]

removed.

 
   if (!IS_FUNCTION(func)) {
     throw MakeTypeError(kNotGeneric, 'Function.prototype.toString');