js_ast: implement rest/spread parsing

lib/runtime/_operations.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.
 
 /* This library defines runtime operations on objects used by the code
  * generator.
  */
 dart_library.library('dart_runtime/_operations', null, /* Imports */[
 ], /* Lazy Imports */[
   'dart/async',
@@ skipping 144 matching lines @@
     let f = obj[symbol];
     let ftype = classes.getMethodType(obj, name);
     return checkAndCall(f, ftype, obj, args, displayName);
   }
 
   function dsend(obj, method/*, ...args*/) {
     return callMethod(obj, method, slice.call(arguments, 2));
   }
   exports.dsend = dsend;
 
-  function dsendArray(obj, method, args) {
-    return dsend(obj, method, ...args);
-  }
-  exports.dsendArray = dsendArray;
-
   function dindex(obj, index) {
     return callMethod(obj, 'get', [index], '[]');
   }
   exports.dindex = dindex;
 
   function dsetindex(obj, index, value) {
     return callMethod(obj, 'set', [index, value], '[]=');
   }
   exports.dsetindex = dsetindex;
 
@@ skipping 214 matching lines @@
     next() {
       let i = this.dartIterator;
       let done = !i.moveNext();
       return { done: done, value: done ? void 0 : i.current };
     }
   }
   exports.JsIterator = JsIterator;
 
 
 });