[SyncFS] Shutdown LocalFileSyncService

[SyncFS] Shutdown LocalFileSyncService before resetting it.


BUG=381050
TEST=./unit_tests --gtest_filter="DriveBackendSyncTest.*" --gtest_repeat=-1 with ASAN build

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=275411

[peria, 2014-06-06 02:41:15]

PTL

[tzik, 2014-06-06 03:05:58]

lgtm

[nhiroki, 2014-06-06 03:13:34]

lgtm

[peria, 2014-06-06 03:20:04]

The CQ bit was checked by peria@chromium.org

[commit-bot: I haz the power, 2014-06-06 03:22:41]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/peria@chromium.org/310253005/1

[commit-bot: I haz the power, 2014-06-06 07:27:36]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_clang_dbg/bui...)
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)
  mac_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-06-06 07:45:53]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-06-06 07:45:54]

Try jobs failed on following builders:
  android_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_clang_dbg/bui...)

[peria, 2014-06-06 07:51:36]

The CQ bit was checked by peria@chromium.org

[commit-bot: I haz the power, 2014-06-06 07:53:37]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/peria@chromium.org/310253005/1

[commit-bot: I haz the power, 2014-06-06 09:27:40]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_clang_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_clang_dbg/bui...)
  mac_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-06-06 11:34:46]

Change committed as 275411