App list: Added contents view custom animation framework.

ui/app_list/app_list.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 120 matching lines @@
         'views/app_list_view.h',
         'views/app_list_view_observer.h',
         'views/apps_grid_view.cc',
         'views/apps_grid_view.h',
         'views/apps_grid_view_delegate.h',
         'views/apps_grid_view_folder_delegate.h',
         'views/cached_label.cc',
         'views/cached_label.h',
         'views/contents_switcher_view.cc',
         'views/contents_switcher_view.h',
+        'views/contents_animator.cc',
+        'views/contents_animator.h',
         'views/contents_view.cc',
         'views/contents_view.h',
         'views/folder_background_view.cc',
         'views/folder_background_view.h',
         'views/folder_header_view.cc',
         'views/folder_header_view.h',
         'views/folder_header_view_delegate.h',
         'views/page_switcher.cc',
         'views/page_switcher.h',
         'views/progress_bar_view.cc',
@@ skipping 201 matching lines @@
                 '../../sandbox/sandbox.gyp:sandbox',
                 '../../content/content.gyp:content_startup_helper_win',
               ],
             }],
           ],
         },
       ],
     }],  # toolkit_views==1
   ],
 }