Cleanup enums for shelf

ash/ash.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,
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
   },
   'includes': [
@@ skipping 133 matching lines @@
         'rotator/screen_rotation.h',
         'screen_ash.cc',
         'screen_ash.h',
         'screensaver/screensaver_view.cc',
         'screensaver/screensaver_view.h',
         'screenshot_delegate.h',
         'shell.cc',
         'shell.h',
         'shell_delegate.h',
         'shell_factory.h',
+        'shelf_types.h',
         'shell_window_ids.h',
         'system/audio/audio_observer.h',
         'system/audio/tray_volume.cc',
         'system/audio/tray_volume.h',
         'system/bluetooth/bluetooth_observer.h',
         'system/bluetooth/tray_bluetooth.cc',
         'system/bluetooth/tray_bluetooth.h',
         'system/brightness/brightness_observer.h',
         'system/brightness/brightness_control_delegate.h',
         'system/brightness/tray_brightness.cc',
@@ skipping 182 matching lines @@
         'wm/session_state_animator.h',
         'wm/session_state_controller.cc',
         'wm/session_state_controller.h',
         'wm/session_state_controller_impl.cc',
         'wm/session_state_controller_impl.h',
         'wm/session_state_controller_impl2.cc',
         'wm/session_state_controller_impl2.h',
         'wm/session_state_observer.h',
         'wm/shelf_layout_manager.cc',
         'wm/shelf_layout_manager.h',
-        'wm/shelf_types.h',
         'wm/stacking_controller.cc',
         'wm/stacking_controller.h',
         'wm/status_area_layout_manager.cc',
         'wm/status_area_layout_manager.h',
         'wm/system_background_controller.cc',
         'wm/system_background_controller.h',
         'wm/system_gesture_event_filter.cc',
         'wm/system_gesture_event_filter.h',
         'wm/system_modal_container_event_filter.cc',
         'wm/system_modal_container_event_filter.h',
@@ skipping 343 matching lines @@
             'shell/cocoa/app-Info.plist',
           ],
           'xcode_settings': {
             'INFOPLIST_FILE': 'shell/cocoa/app-Info.plist',
           },
         }],
       ],
     },
   ],
 }