sync: turn on deferred startup.

sync: turn on deferred startup.

BUG=80194
R=rlarocque@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=254678

[tim (not reviewing), 2014-03-01 02:14:32]

Ready to go! I ran an experiment a few weeks back enabling this flag to verify
it was doing what we expect and sent a few visualizations of the results to
chrome-perf@.  I re-ran the same experiments now for good measure and the
results are roughly identical (in case you were interested).

[rlarocque, 2014-03-03 18:20:37]

lgtm.

[tim (not reviewing), 2014-03-03 19:15:19]

The CQ bit was checked by tim@chromium.org

[commit-bot: I haz the power, 2014-03-03 19:17:57]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tim@chromium.org/184103008/1

[commit-bot: I haz the power, 2014-03-03 19:28:16]

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

[commit-bot: I haz the power, 2014-03-03 19:28:17]

Retried try job too often on win_rel for step(s) app_list_unittests,
ash_unittests, aura_unittests, cacheinvalidation_unittests, cc_unittests,
check_deps, check_deps2git, chrome_elf_unittests, chromedriver_unittests,
components_unittests, compositor_unittests, content_browsertests,
content_unittests, crypto_unittests, events_unittests, gfx_unittests,
google_apis_unittests, gpu_unittests, installer_util_unittests, ipc_tests,
jingle_unittests, media_unittests, mini_installer_test, nacl_integration,
ppapi_unittests, printing_unittests, remoting_unittests, sql_unittests,
sync_integration_tests, sync_unit_tests, telemetry_perf_unittests,
telemetry_unittests, views_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[tim (not reviewing), 2014-03-03 19:42:04]

The CQ bit was checked by tim@chromium.org

[commit-bot: I haz the power, 2014-03-03 19:46:18]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tim@chromium.org/184103008/1

[commit-bot: I haz the power, 2014-03-03 20:05:22]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tim@chromium.org/184103008/1

[commit-bot: I haz the power, 2014-03-04 05:05:50]

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

[commit-bot: I haz the power, 2014-03-04 05:05:50]

The commit queue went berserk retrying too often for a
seemingly flaky test on builder android_dbg:
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=android_db...
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=android_db...
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=android_db...
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=android_db...
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=android_db...
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=android_db...
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=android_db...

[tim (not reviewing), 2014-03-04 05:43:58]

Committed patchset #1 manually as r254678 (presubmit successful).