Get the basics of deferred libraries working.

pkg/dev_compiler/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.
 
 define(['dart_sdk', 'async_helper', 'expect', 'unittest', 'is', 'require'],
       function(dart_sdk, async_helper, expect, unittest, is, require) {
   'use strict';
 
   async_helper = async_helper.async_helper;
   let minitest = expect.minitest;
@@ skipping 106 matching lines @@
       'const_switch_test_04_multi': skip_fail,
       'constructor11_test': skip_fail,
       'constructor12_test': skip_fail,
       'cyclic_type2_test': skip_fail,
       'cyclic_type_test_00_multi': skip_fail,
       'cyclic_type_test_01_multi': skip_fail,
       'cyclic_type_test_02_multi': skip_fail,
       'cyclic_type_test_03_multi': skip_fail,
       'cyclic_type_test_04_multi': skip_fail,
       'cyclic_type_variable_test_none_multi': skip_fail,
+
+      // Deferred libraries are not actually deferred. These tests all test
+      // that synchronous access to the library fails.
       'deferred_call_empty_before_load_test': skip_fail,
-      'deferred_closurize_load_library_test': skip_fail,
-      'deferred_constant_list_test': skip_fail,
-      'deferred_function_type_test': skip_fail,
-      'deferred_inlined_test': skip_fail,
-      'deferred_load_inval_code_test': skip_fail,
-      'deferred_mixin_test': skip_fail,
-      'deferred_no_such_method_test': skip_fail, // deferred libs not implemented
       'deferred_not_loaded_check_test': skip_fail,
-      'deferred_only_constant_test': skip_fail,
-      'deferred_optimized_test': skip_fail,
       'deferred_redirecting_factory_test': skip_fail,
-      'deferred_regression_22995_test': skip_fail,
-      'deferred_shadow_load_library_test': skip_fail,
-      'deferred_shared_and_unshared_classes_test': skip_fail,
       'deferred_static_seperate_test': skip_fail,
+
+      'deferred_regression_22995_test': skip_fail, // Strong mode "is" rejects some type tests.
       'double_int_to_string_test': skip_fail,
       'double_to_string_test': skip_fail,
       'dynamic_test': skip_fail,
       'enum_mirror_test': skip_fail,
       'exception_test': fail,
       'execute_finally6_test': skip_fail,
       'expect_test': skip_fail,
       'extends_test_lib': skip_fail,
       'external_test_10_multi': skip_fail,
       'external_test_13_multi': skip_fail,
@@ skipping 698 matching lines @@
 
     for (let action of unittest_tests) {
       try {
         action();
       } catch (e) {
         console.error("Caught error tying to setup test:", e);
       }
     }
   });
 });