ash: Add vertical spacing to multi-line text in tray.

ash/system/date/tray_date.h

 // 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.
 
 #ifndef ASH_SYSTEM_DATE_TRAY_DATE_H_
 #define ASH_SYSTEM_DATE_TRAY_DATE_H_
 #pragma once
 
 #include "ash/system/date/clock_observer.h"
 #include "ash/system/tray/system_tray_item.h"
 
 namespace ash {
 namespace internal {
 
 namespace tray {
-class DateView;
+class TimeView;
 }
 
 class TrayDate : public SystemTrayItem,
                  public ClockObserver {
  public:
   TrayDate();
   virtual ~TrayDate();
 
  private:
   // Overridden from SystemTrayItem.
   virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
   virtual void DestroyTrayView() OVERRIDE;
   virtual void DestroyDefaultView() OVERRIDE;
   virtual void DestroyDetailedView() OVERRIDE;
   virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
 
   // Overridden from ClockObserver.
   virtual void OnDateFormatChanged() OVERRIDE;
   virtual void Refresh() OVERRIDE;
 
-  scoped_ptr<tray::DateView> date_tray_;
+  scoped_ptr<tray::TimeView> time_tray_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayDate);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_DATE_TRAY_DATE_H_