[ash] Add TYPE_DIALOG and its item's LauncherContextMenu

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 192 matching lines @@
         'shelf/scoped_observer_with_duplicated_sources.h',
         'shelf/shelf_alignment_menu.cc',
         'shelf/shelf_alignment_menu.h',
         'shelf/shelf_bezel_event_filter.cc',
         'shelf/shelf_bezel_event_filter.h',
         'shelf/shelf_button.cc',
         'shelf/shelf_button.h',
         'shelf/shelf_button_host.h',
         'shelf/shelf_delegate.h',
         'shelf/shelf_icon_observer.h',
+        'shelf/shelf_item_context_menu.cc',
+        'shelf/shelf_item_context_menu.h',
         'shelf/shelf_item_delegate.h',
         'shelf/shelf_item_delegate_manager.cc',
         'shelf/shelf_item_delegate_manager.h',
         'shelf/shelf_layout_manager.cc',
         'shelf/shelf_layout_manager.h',
         'shelf/shelf_layout_manager_observer.h',
         'shelf/shelf_menu_model.h',
         'shelf/shelf_model.cc',
         'shelf/shelf_model.h',
         'shelf/shelf_model_observer.h',
@@ skipping 779 matching lines @@
             },
           },
           'dependencies': [
             '../sandbox/sandbox.gyp:sandbox',
           ],
         }],
       ],
     },
   ],
 }