[proxies] Expose proxies in the API

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 4e2b668ea37dcd892e931ec7001748c643f4d552..267d3708e83c2f3e3121418c3849f7bb2a2310b8 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1901,31 +1901,6 @@ BUILTIN(ObjectProtoToString) {
 
 namespace {
 
-// ES6 section 9.5.15 ProxyCreate (target, handler)
-MaybeHandle<JSProxy> ProxyCreate(Isolate* isolate, Handle<Object> target,
-                                 Handle<Object> handler) {
-  if (!target->IsJSReceiver()) {
-    THROW_NEW_ERROR(isolate, NewTypeError(MessageTemplate::kProxyNonObject),
-                    JSProxy);
-  }
-  if (target->IsJSProxy() && JSProxy::cast(*target)->IsRevoked()) {
-    THROW_NEW_ERROR(isolate,
-                    NewTypeError(MessageTemplate::kProxyHandlerOrTargetRevoked),
-                    JSProxy);
-  }
-  if (!handler->IsJSReceiver()) {
-    THROW_NEW_ERROR(isolate, NewTypeError(MessageTemplate::kProxyNonObject),
-                    JSProxy);
-  }
-  if (handler->IsJSProxy() && JSProxy::cast(*handler)->IsRevoked()) {
-    THROW_NEW_ERROR(isolate,
-                    NewTypeError(MessageTemplate::kProxyHandlerOrTargetRevoked),
-                    JSProxy);
-  }
-  return isolate->factory()->NewJSProxy(Handle<JSReceiver>::cast(target),
-                                        Handle<JSReceiver>::cast(handler));
-}
-
 }  // namespace
 
 
@@ -1960,7 +1935,7 @@ BUILTIN(ProxyConstructor_ConstructStub) {
   isolate->set_context(args.target()->context());
   Handle<JSProxy> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
-                                     ProxyCreate(isolate, target, handler));
+                                     JSProxy::New(isolate, target, handler));
   return *result;
 }