Cross Reference: /external/chromium_org/ash/system/session_length

`Name`	`Date`	`Size`
Up to higher level directory
`session_length_limit_observer.h`	11-Dec-2013	`770`
`tray_session_length_limit.cc`	11-Dec-2013	`13.6K`
`tray_session_length_limit.h`	11-Dec-2013	`2.2K`

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