Christopher Tate 2a935096db Don't spuriously time out restore sessions
If a restore set lookup took a long time, the client's restore
session could be declared timed out even though the client was
not at fault.  Handle this properly by resetting the timeout clock
when control of the session is returned to the client.

Bug 3477324

Change-Id: I43afaf1063e8e706ef16b70be77f9eeeea6a321f
2011-03-03 17:30:32 -08:00
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