tree 877f3e9dca02f6c6988593062388b82fdcf441ee
parent d7c46bdec12b364f79ab44c089928a6d2734694c
author Daichi Hirono <hirono@google.com> 1452743149 +0900
committer Daichi Hirono <hirono@google.com> 1452743149 +0900

Check isDestroyed after finishing async HandleRootsChangedTask.

HandleRootsChangedTask will be finished after the Activity is destroyed,
though we no longer to be able to change the directory at that time.

BUG=26454277

Change-Id: Ia414134c80d900ef2e6c382fdd9209a154d940af