Roll leveldb to r77.

Roll leveldb to r77.

Biggest change for chromium is no longer using .sst as the sstable file
extension. The .sst extension caused windows system restore to corrupt
databases (error message: Corruption: 1 missing files; e.g...).

The only other change that could affect chromium is a bugfix, where
changing directions on an iterator could yield the wrong value.
(https://code.google.com/p/leveldb/issues/detail?id=200)

BUG=261623
R=jsbell@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=224433

[dgrogan, 2013-09-19 21:13:14]

Josh or Alec, could you review this?

[jsbell, 2013-09-19 21:28:01]

lgtm

[commit-bot: I haz the power, 2013-09-19 21:32:22]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dgrogan@chromium.org/23976008/1

[commit-bot: I haz the power, 2013-09-20 01:59:12]

Retried try job too often on win_rel for step(s) sync_integration_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2013-09-20 02:05:07]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dgrogan@chromium.org/23976008/1

[commit-bot: I haz the power, 2013-09-20 08:39:02]

Retried try job too often on win_rel for step(s) sync_integration_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2013-09-20 15:58:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dgrogan@chromium.org/23976008/1

[dgrogan, 2013-09-20 18:13:54]

Committed patchset #1 manually as r224433 (presubmit successful).