[Aura] Refactor and update app list window.

ui/aura_shell/aura_shell.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,
   },
 
   'targets': [
@@ skipping 17 matching lines @@
         '../ui.gyp:ui_resources',
         '../ui.gyp:ui_resources_standard',
       ],
       'defines': [
         'AURA_SHELL_IMPLEMENTATION',
       ],
       'sources': [
         # All .cc, .h under views, except unittests
         'always_on_top_controller.cc',
         'always_on_top_controller.h',
+        'app_list.cc',
+        'app_list.h',
         'default_container_event_filter.cc',
         'default_container_event_filter.h',
         'default_container_layout_manager.cc',
         'default_container_layout_manager.h',
         'desktop_background_view.cc',
         'desktop_background_view.h',
         'desktop_event_filter.cc',
         'desktop_event_filter.h',
         'desktop_layout_manager.cc',
         'desktop_layout_manager.h',
@@ skipping 132 matching lines @@
         'examples/widgets.cc',
         'examples/window_type_launcher.cc',
         'examples/window_type_launcher.h',
         '<(SHARED_INTERMEDIATE_DIR)/ui/gfx/gfx_resources.rc',
         '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources.rc',
         '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources_standard/ui_resources_standard.rc',
       ],
     },
   ],
 }