Cross Reference: /external/chromium_org/ui/webui/resources/images/2x/apps

`Name`	`Date`	`Size`
Up to higher level directory
`button_butter_bar_close.png`	05-Aug-2015	`143`
`button_butter_bar_close_hover.png`	05-Aug-2015	`154`
`button_butter_bar_close_pressed.png`	05-Aug-2015	`158`
`topbar_button_close.png`	05-Aug-2015	`241`
`topbar_button_maximize.png`	05-Aug-2015	`128`
`topbar_button_minimize.png`	05-Aug-2015	`110`
`topbar_button_settings.png`	05-Aug-2015	`402`

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