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

ash/system/chromeos/multi_user/user_switch_util_unittest.cc

 // Copyright 2014 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/common/system/chromeos/screen_security/screen_tray_item.h"
+#include "ash/common/system/tray/system_tray.h"
 #include "ash/shell.h"
 #include "ash/system/chromeos/multi_user/user_switch_util.h"
-#include "ash/system/tray/system_tray.h"
 #include "ash/test/ash_test_base.h"
 
 namespace ash {
 
 class TrySwitchingUserTest : public ash::test::AshTestBase {
  public:
   // The action type to perform / check for upon user switching.
   enum ActionType {
     NO_DIALOG,       // No dialog should be shown.
     ACCEPT_DIALOG,   // A dialog should be shown and we should accept it.
@@ skipping 187 matching lines @@
   EXPECT_EQ(1, stop_share_callback_hit_count());
   // Another stop should have no effect.
   StopShareSession();
   StopCaptureSession();
   EXPECT_EQ(1, switch_callback_hit_count());
   EXPECT_EQ(1, stop_capture_callback_hit_count());
   EXPECT_EQ(1, stop_share_callback_hit_count());
 }
 
 }  // namespace ash