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

`Name`	`Date`	`Size`
Up to higher level directory
`session_length_limit_observer.h`	03-Jun-2014	`810`
`tray_session_length_limit.cc`	03-Jun-2014	`13.8K`
`tray_session_length_limit.h`	03-Jun-2014	`2.1K`
`tray_session_length_limit_unittest.cc`	03-Jun-2014	`6.6K`

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