Handle Creates and Returns annotations in KernelBehaviorBuilder

tests/compiler/dart2js/js_spec_string_test.dart

 // Copyright (c) 2014, 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.
 
 // Unit test of the [NativeBehavior.processSpecString] method.
 
 import 'package:expect/expect.dart';
 import 'package:compiler/src/native/native.dart';
 import 'package:compiler/src/diagnostics/diagnostic_listener.dart';
 import 'package:compiler/src/diagnostics/messages.dart';
@@ skipping 39 matching lines @@
   NativeThrowBehavior actualThrows;
   bool actualNew;
   bool actualGvn;
   Listener listener = new Listener();
   try {
     NativeBehavior.processSpecString(listener, null, specString,
         setSideEffects: (effects) => actualSideEffects = effects,
         setThrows: (b) => actualThrows = b,
         setIsAllocation: (b) => actualNew = b,
         setUseGvn: (b) => actualGvn = b,
-        lookupType: (t) => t,
+        lookupType: (t, {required}) => t,
         typesReturned: actualReturns,
         typesInstantiated: actualCreates,
         objectType: OBJECT,
         nullType: NULL);
   } catch (e) {
     Expect.isTrue(expectError, 'Unexpected error "$specString"');
     Expect.isNotNull(listener.errorMessage, 'Error message expected.');
     return;
   }
   Expect.isFalse(expectError, 'Missing error for "$specString".');
@@ skipping 216 matching lines @@
   test('gvn:false', expectedGvn: false);
   test('returns:A;gvn:true', returns: ['A'], expectedGvn: true);
   test(' gvn : true ;  returns:A;', returns: ['A'], expectedGvn: true);
   test('gvn:true;returns:A;gvn:true', expectError: true);
 
   test('gvn: true; new: true', expectError: true);
   test('gvn: true; new: false', expectedGvn: true, expectedNew: false);
   test('gvn: false; new: true', expectedGvn: false, expectedNew: true);
   test('gvn: false; new: false', expectedGvn: false, expectedNew: false);
 }