Separate the logic of popup alignment and workarea handling as delegate.

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',
   },
   'targets': [
@@ skipping 486 matching lines @@
         'system/user/tray_user_separator.cc',
         'system/user/tray_user_separator.h',
         'system/user/update_observer.h',
         'system/user/user_observer.h',
         'system/user/user_accounts_delegate.cc',
         'system/user/user_accounts_delegate.h',
         'system/user/user_card_view.cc',
         'system/user/user_card_view.h',
         'system/user/user_view.cc',
         'system/user/user_view.h',
+        'system/web_notification/ash_popup_alignment_delegate.cc',
+        'system/web_notification/ash_popup_alignment_delegate.h',
         'system/web_notification/web_notification_tray.cc',
         'system/web_notification/web_notification_tray.h',
         'system/win/audio/tray_audio_delegate_win.cc',
         'system/win/audio/tray_audio_delegate_win.h',
         'system/win/audio/tray_audio_win.cc',
         'system/win/audio/tray_audio_win.h',
         'touch/touch_hud_debug.cc',
         'touch/touch_hud_debug.h',
         'touch/touch_hud_projection.cc',
         'touch/touch_hud_projection.h',
@@ skipping 463 matching lines @@
         'system/chromeos/screen_security/screen_tray_item_unittest.cc',
         'system/chromeos/session/logout_confirmation_controller_unittest.cc',
         'system/chromeos/session/tray_session_length_limit_unittest.cc',
         'system/chromeos/tray_display_unittest.cc',
         'system/date/date_view_unittest.cc',
         'system/overview/overview_button_tray_unittest.cc',
         'system/tray/media_security/multi_profile_media_tray_item_unittest.cc',
         'system/tray/system_tray_unittest.cc',
         'system/tray/tray_details_view_unittest.cc',
         'system/user/tray_user_unittest.cc',
+        'system/web_notification/ash_popup_alignment_delegate_unittest.cc',
         'system/web_notification/web_notification_tray_unittest.cc',
         'test/ash_test_helper_unittest.cc',
         'test/ash_unittests.cc',
         'tooltips/tooltip_controller_unittest.cc',
         'touch/touch_observer_hud_unittest.cc',
         'touch/touch_transformer_controller_unittest.cc',
         'wm/app_list_controller_unittest.cc',
         'wm/ash_native_cursor_manager_unittest.cc',
         'wm/dock/docked_window_layout_manager_unittest.cc',
         'wm/dock/docked_window_resizer_unittest.cc',
@@ skipping 219 matching lines @@
       'conditions': [
         ['chromeos==1', {
           'dependencies': [
             '../ui/display/display.gyp:display',
           ],
         }],
       ],
     },
   ],
 }