fixes for angular hello: String + and disable broken arg parsing

lib/runtime/dart_runtime.js

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 var dart, _js_helper;
 (function (dart) {
   'use strict';
 
   let defineProperty = Object.defineProperty;
   let getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
@@ skipping 36 matching lines @@
   }
 
   function checkAndCall(f, obj, args, name) {
     if (!(f instanceof Function)) {
       // Grab the `call` method if it's not a function.
       if (f !== null) f = f.call;
       if (!(f instanceof Function)) {
         throwNoSuchMethod(obj, method, args);
       }
     }
+    // TODO(jmesserly): enable this when we can fix => and methods.
+    /*
     let formals = formalParameterList(f);
     // TODO(vsm): Type check args!  We need to encode sufficient type info on f.
     if (formals.length < args.length) {
       throwNoSuchMethod(obj, name, args, f);
     } else if (formals.length > args.length) {
       for (let i = args.length; i < formals.length; ++i) {
         if (formals[i].indexOf("opt$") != 0) {
           throwNoSuchMethod(obj, name, args, f);
         }
       }
     }
+    */
     return f.apply(obj, args);
   }
 
   function dcall(f/*, ...args*/) {
     let args = Array.prototype.slice.call(arguments, 1);
     return checkAndCall(f, void 0, args, 'call');
   }
   dart.dcall = dcall;
 
   function dsend(obj, method/*, ...args*/) {
@@ skipping 673 matching lines @@
   // TODO(vsm): How should we encode the runtime type?
   dart.runtimeType = Symbol('runtimeType');
 
   dart.JsSymbol = Symbol;
 
   // TODO(jmesserly): hack to bootstrap the SDK
   _js_helper = _js_helper || {};
   _js_helper.checkNum = notNull;
 
 })(dart || (dart = {}));