Reposition toasts to align the closed one.

ui/message_center/message_center.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 111 matching lines @@
             '../ui.gyp:ui_test_support',
           ],
         }],
         ['toolkit_views==1', {
           'dependencies': [
             # Compositor is needed by message_center_view_unittest.cc
             # and for the fonts used by bounded_label_unittest.cc.
             '../compositor/compositor.gyp:compositor',
             '../compositor/compositor.gyp:compositor_test_support',
             '../views/views.gyp:views',
+            '../views/views.gyp:views_test_support',
           ],
           'sources': [
             'views/bounded_label_unittest.cc',
             'views/message_center_view_unittest.cc',
+            'views/message_popup_collection_unittest.cc',
           ],
         }],
       ],
     },  # target_name: message_center_unittests
   ],
 }