Fix for dcall on callable class

pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/operations.dart

 // 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.
 part of dart._runtime;
 
 class InvocationImpl extends Invocation {
   final Symbol memberName;
@@ skipping 225 matching lines @@
   function callNSM() {
     return $noSuchMethod(originalTarget, new $InvocationImpl(
         $name, $args,
         {namedArguments: $extractNamedArgs($args), isMethod: true}));
   }
   if (!($f instanceof Function)) {
     // We're not a function (and hence not a method either)
     // Grab the `call` method if it's not a function.
     if ($f != null) {
       $ftype = $getMethodType($getType($f), 'call');
-      $f = $f.call;
+      $f = f.call ? $bind($f, 'call') : void 0;
     }
     if (!($f instanceof Function)) {
       return callNSM();
     }
   }
   // If f is a function, but not a method (no method type)
   // then it should have been a function valued field, so
   // get the type from the function.
   if ($ftype === void 0) {
     $ftype = $_getRuntimeType($f);
@@ skipping 718 matching lines @@
     name = '+' + name;
   }
   return name;
 }
 
 /// Emulates the implicit "loadLibrary" function provided by a deferred library.
 ///
 /// Libraries are not actually deferred in DDC, so this just returns a future
 /// that completes immediately.
 Future loadLibrary() => new Future.value();