allow JS builtin to be typed as needed

test/browser/language_tests.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.
 
 (function() {
   'use strict';
 
   let _isolate_helper = dart_library.import('dart/_isolate_helper');
   _isolate_helper.startRootIsolate(function() {}, []);
   let async_helper = dart_library.import('async_helper/async_helper');
@@ skipping 176 matching lines @@
     'infinite_switch_label_test',
     'infinity_test',
     'instance_creation_in_function_annotation_test',
     'instanceof2_test',
     'instanceof4_test_01_multi',
     'instanceof4_test_none_multi',
     'instanceof_optimized_test',
     'int_test',
     'integer_division_by_zero_test',
     'interceptor_test',
+    'interceptor9_test',

[Jennifer Messerly, 2016/01/28 00:46:18]

The interceptor9_test expects to create a typed array, checks that an "is" check
works, then triggers a no such method on it.

However the catch is not precise enough--it would allow any error other than
ExpectException(!), and made no attempt to verify where the error was thrown.
Previously we were failing on a DDC cast inside typed_data constructor, so we
never even reached the "is" check. Now we make it there, but we fail the `is`
check, causing the test to fail.

It is good the test fails, because typed_data is not implemented correctly yet.
:)

Aside: the test could've been more straightforwardly written, but it goes to
great pains to confuse dart2js, confusing itself in the process. ;)

     'is_nan_test',
     'issue10747_test',
     'issue13179_test',
     'issue21079_test',
     'issue21957_test',
     'issue_1751477_test',
     'issue_22780_test_01_multi',
     'issue_23914_test',
     'js_properties_test',
     'lazy_static3_test',
@@ skipping 156 matching lines @@
           if (!async_helper.asyncTestStarted) done();
         });
       }
     }
   });
 
   dart_library.import('language/async_await_test_none_multi').main();
   dart_library.import('language/async_star_test_none_multi').main();
 
 })();