Positions the launcher in the bottom left corner. Adds ShellDelegate

ui/aura/aura.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 31 matching lines @@
         'root_window.h',
         'screen_aura.cc',
         'screen_aura.h',
         'toplevel_window_container.cc',
         'toplevel_window_container.h',
         'toplevel_window_event_filter.cc',
         'toplevel_window_event_filter.h',
         'window.cc',
         'window.h',
         'window_delegate.h',
+        'window_observer.h',
         'window_types.h',
       ],
     },
     {
       'target_name': 'aura_demo',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:base_i18n',
         '../../skia/skia.gyp:skia',
@@ skipping 59 matching lines @@
         }],
         ['OS!="mac"', {
           'dependencies': [
             '../../chrome/chrome.gyp:packed_resources',
            ],
         }],
       ],
     },
   ],
 }