Create system tray item for accessing chrome://slow

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 326 matching lines @@
         'system/tray/tray_popup_label_button.h',
         'system/tray/tray_popup_label_button_border.cc',
         'system/tray/tray_popup_label_button_border.h',
         'system/tray/tray_utils.cc',
         'system/tray/tray_utils.h',
         'system/tray/view_click_listener.h',
         'system/tray_accessibility.cc',
         'system/tray_accessibility.h',
         'system/tray_caps_lock.cc',
         'system/tray_caps_lock.h',
+        'system/tray_tracing.cc',
+        'system/tray_tracing.h',
         'system/tray_update.cc',
         'system/tray_update.h',
         'system/user/login_status.cc',
         'system/user/login_status.h',
         'system/user/tray_user.cc',
         'system/user/tray_user.h',
         'system/user/update_observer.h',
         'system/user/user_observer.h',
         'system/web_notification/web_notification_tray.cc',
         'system/web_notification/web_notification_tray.h',
@@ skipping 555 matching lines @@
             'shell/cocoa/app-Info.plist',
           ],
           'xcode_settings': {
             'INFOPLIST_FILE': 'shell/cocoa/app-Info.plist',
           },
         }],
       ],
     },
   ],
 }