content: Move gtk_expanded_container to ui/base/gtk/.

ui/ui.gyp

 # Copyright (c) 2011 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,
     'toolkit_views2': 0,  # ui/views/ is an experimental framework on Windows.
   },
   'target_defaults': {
@@ skipping 88 matching lines @@
         'base/dragdrop/os_exchange_data.h',
         'base/dragdrop/os_exchange_data_provider_gtk.cc',
         'base/dragdrop/os_exchange_data_provider_gtk.h',
         'base/dragdrop/os_exchange_data_provider_win.cc',
         'base/dragdrop/os_exchange_data_provider_win.h',
         'base/events.h',
         'base/gtk/event_synthesis_gtk.cc',
         'base/gtk/event_synthesis_gtk.h',
         'base/gtk/g_object_destructor_filo.cc',
         'base/gtk/g_object_destructor_filo.h',
+        'base/gtk/gtk_expanded_container.cc',
+        'base/gtk/gtk_expanded_container.h',
         'base/gtk/gtk_floating_container.cc',
         'base/gtk/gtk_floating_container.h',
         'base/gtk/gtk_im_context_util.cc',
         'base/gtk/gtk_im_context_util.h',
         'base/gtk/gtk_signal.h',
         'base/gtk/gtk_signal_registrar.cc',
         'base/gtk/gtk_signal_registrar.h',
         'base/gtk/gtk_windowing.cc',
         'base/gtk/gtk_windowing.h',
         'base/gtk/owned_widget_gtk.cc',
@@ skipping 405 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
       ],
     }],
   ],
 }