mojo: kill app_thread before unloading main app library and add tests

mojo/mojo.gyp

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'target_defaults': {
     'conditions': [
       ['mojo_shell_debug_url != ""', {
         'defines': [
           'MOJO_SHELL_DEBUG=1',
@@ skipping 654 matching lines @@
       ],
     },
     {
       'target_name': 'mojo_shell_tests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:base_i18n',
         '../base/base.gyp:test_support_base',
         '../testing/gtest.gyp:gtest',
+        '../net/net.gyp:net_test_support',
         # TODO(vtl): We don't currently need this, but I imagine we will soon.
         # '../ui/gl/gl.gyp:gl',
         '../url/url.gyp:url_lib',
         'mojo_common_lib',
         'mojo_environment_chromium',
         'mojo_service_manager',
         'mojo_shell_lib',
         'mojo_system_impl',
         'mojo_test_app',
         'mojo_test_request_tracker_app',
@@ skipping 369 matching lines @@
             'views/views_init_internal.h',
           ],
           'defines': [
             'MOJO_VIEWS_IMPLEMENTATION',
           ],
         },
       ],
     }],
   ],
 }