Christopher Tate b0183f0ae3 Harden against transiently unavailable backup transports
The init & clear operations are particularly important to ensure
delivery when at all possible, so we retry those periodically
if the transport is unavailable when we first attempt them.

Now with 100% less build break.

Bug 11716868

Change-Id: I2af4e93788068cfac97c0a48d3568c561eefa23d
2013-11-19 11:24:46 -08:00
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