tree caf438fc99b8fb5a9139512db4cb9e4cc21ffe34
parent 2765d0abccd0c754422332d114cdecc271888e2d
author Bertrand SIMONNET <bsimonnet@google.com> 1441820391 -0700
committer Bertrand SIMONNET <bsimonnet@google.com> 1442264133 -0700

metricsd: Persist the report to disk if an upload fails.

If the metrics server is unreachable, we may need to resend a metrics
report later. Instead of keeping the staged report in memory, save it to
disk to avoid loosing data if the system restarts or crashes.

BUG: 23033262
TEST: unit tests.

Change-Id: Idd14964e40f022952469f47d675d8cda9586d7cd