mash: Move StatusTray and StatusAreaWidget to //ash/common

ash/first_run/first_run_helper_impl.cc

 // Copyright 2013 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.
 
 #include "ash/first_run/first_run_helper_impl.h"
 
 #include "ash/common/shell_window_ids.h"
+#include "ash/common/system/tray/system_tray.h"
 #include "ash/shelf/app_list_button.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shell.h"
-#include "ash/system/tray/system_tray.h"
 #include "base/logging.h"
 #include "ui/app_list/views/app_list_view.h"
 #include "ui/aura/window.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
@@ skipping 70 matching lines @@
   return bubble->GetBoundsInScreen();
 }
 
 gfx::Rect FirstRunHelperImpl::GetHelpButtonBounds() {
   SystemTray* tray = Shell::GetInstance()->GetPrimarySystemTray();
   views::View* help_button = tray->GetHelpButtonView();
   return help_button->GetBoundsInScreen();
 }
 
 }  // namespace ash