Cross Reference: /external/chromium_org/ppapi/utility/threading

`Name`	`Date`	`Size`
Up to higher level directory
`lock.cc`	16-Dec-2014	`999`
`lock.h`	16-Dec-2014	`1.8K`
`simple_thread.cc`	16-Dec-2014	`2.4K`
`simple_thread.h`	16-Dec-2014	`2K`