TSAN: Speculative fix for race errors in DeviceOrientationProviderTest.

TSAN: Speculative fix for race errors in DeviceOrientationProviderTest.

BUG=139849
TEST=none

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=149276

[pivanof, 2012-07-31 18:56:55]

FTR: multi-thread refcounting for MockOrientationFactory was introduced by me in
https://chromiumcodereview.appspot.com/10835030/. I should have noticed that
MockOrientationFactory is not thread-safe.

[piman, 2012-07-31 18:58:12]

lgtm

[commit-bot: I haz the power, 2012-07-31 19:00:05]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/thestig@chromium.org/10846003/4001

[commit-bot: I haz the power, 2012-07-31 19:18:57]

Try job failure for 10846003-4001 (retry) on mac_rel for steps "base_unittests,
browser_tests, cacheinvalidation_unittests, jingle_unittests,
remoting_unittests, interactive_ui_tests, crypto_unittests, net_unittests,
unit_tests, gpu_unittests, nacl_integration, media_unittests,
safe_browsing_tests, ipc_tests, printing_unittests, sql_unittests,
content_unittests, sync_unit_tests".
It's a second try, previously, steps "base_unittests, browser_tests,
cacheinvalidation_unittests, jingle_unittests, remoting_unittests,
interactive_ui_tests, crypto_unittests, net_unittests, unit_tests,
gpu_unittests, nacl_integration, media_unittests, safe_browsing_tests,
ipc_tests, printing_unittests, sql_unittests, content_unittests,
sync_unit_tests" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_rel&nu...

[commit-bot: I haz the power, 2012-07-31 19:41:41]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/thestig@chromium.org/10846003/4001

[commit-bot: I haz the power, 2012-07-31 21:19:44]

Change committed as 149276