mojo_public_system_perftests: replace mojo::Thread with base::SimpleThread.

mojo_public_system_perftests: replace mojo::Thread with base::SimpleThread.

This is a preparation of removing the mojo/public/cpp/utility folder.

BUG=570102
Committed: https://crrev.com/428d9b4fb3ee8d9831238358a93ea6a3e9ad28f1
Cr-Commit-Position: refs/heads/master@{#380273}

[yzshen1, 2016-03-09 22:33:26]

yzshen@chromium.org changed reviewers:
+ rockot@chromium.org

[yzshen1, 2016-03-09 22:33:27]

Hi, Ken.

Would you please take a look? Thanks!

[Ken Rockot(use gerrit already), 2016-03-09 22:34:52]

lgtm

[yzshen1, 2016-03-09 22:36:53]

The CQ bit was checked by yzshen@chromium.org

[commit-bot: I haz the power, 2016-03-09 22:37:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1779993002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1779993002/20001

[commit-bot: I haz the power, 2016-03-10 00:39:46]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-03-10 00:40:53]

Description was changed from

==========
mojo_public_system_perftests: replace mojo::Thread with base::SimpleThread.

This is a preparation of removing the mojo/public/cpp/utility folder.

BUG=570102
==========

to

==========
mojo_public_system_perftests: replace mojo::Thread with base::SimpleThread.

This is a preparation of removing the mojo/public/cpp/utility folder.

BUG=570102

Committed: https://crrev.com/428d9b4fb3ee8d9831238358a93ea6a3e9ad28f1
Cr-Commit-Position: refs/heads/master@{#380273}
==========

[commit-bot: I haz the power, 2016-03-10 00:40:54]

Patchset 2 (id:??) landed as
https://crrev.com/428d9b4fb3ee8d9831238358a93ea6a3e9ad28f1
Cr-Commit-Position: refs/heads/master@{#380273}