[proxies] Better print for proxies in d8

src/js/v8natives.js

Index: src/js/v8natives.js
diff --git a/src/js/v8natives.js b/src/js/v8natives.js
index 558bce2ce5e9c77a9efe810e1d0b5c720b7597b3..0b91e1fdc396bd8bf3cdc343ff48ec65e79949ab 100644
--- a/src/js/v8natives.js
+++ b/src/js/v8natives.js
@@ -504,7 +504,7 @@ function GetOwnPropertyJS(obj, v) {
     // TODO(rossberg): adjust once there is a story for symbols vs proxies.
     if (IS_SYMBOL(v)) return UNDEFINED;
 
-    var handler = %GetHandler(obj);
+    var handler = %JSProxyGetHandler(obj);
     var descriptor = CallTrap1(
                          handler, "getOwnPropertyDescriptor", UNDEFINED, p);
     if (IS_UNDEFINED(descriptor)) return descriptor;
@@ -538,7 +538,7 @@ function DefineProxyProperty(obj, p, attributes, should_throw) {
   // TODO(rossberg): adjust once there is a story for symbols vs proxies.
   if (IS_SYMBOL(p)) return false;
 
-  var handler = %GetHandler(obj);
+  var handler = %JSProxyGetHandler(obj);
   var result = CallTrap2(handler, "defineProperty", UNDEFINED, p, attributes);
   if (!result) {
     if (should_throw) {