Port https://sites.google.com/a/chromium.org/dev/developers/design-documents/threading/suble-thread…

Port https://sites.google.com/a/chromium.org/dev/developers/design-documents/threading/suble-threading-bugs-and-patterns-to-avoid-them to in-repo documentation.  This is a straight port is almost no content editing.

BUG=

Review-Url: https://codereview.chromium.org/2883903004
Cr-Commit-Position: refs/heads/master@{#472266}
Committed: https://chromium.googlesource.com/chromium/src/+/efe31a69050d5b1f0830124b172f9d323c460972

[Carlson, 2017-05-15 23:42:02]

justincarlson@chromium.org changed reviewers:
+ dpranke@chromium.org

[Dirk Pranke, 2017-05-16 22:44:09]

lgtm

[Carlson, 2017-05-16 22:51:37]

The CQ bit was checked by justincarlson@chromium.org

[commit-bot: I haz the power, 2017-05-16 22:53:18]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-17 00:37:29]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494975097598960, "parent_rev":
"0c9c5ad919696df4b6e666468ccc7cc1497cd676", "commit_rev":
"efe31a69050d5b1f0830124b172f9d323c460972"}

[commit-bot: I haz the power, 2017-05-17 00:37:40]

Description was changed from

==========
Port
https://sites.google.com/a/chromium.org/dev/developers/design-documents/threa...
to in-repo documentation.  This is a straight port is almost no content editing.

BUG=
==========

to

==========
Port
https://sites.google.com/a/chromium.org/dev/developers/design-documents/threa...
to in-repo documentation.  This is a straight port is almost no content editing.

BUG=

Review-Url: https://codereview.chromium.org/2883903004
Cr-Commit-Position: refs/heads/master@{#472266}
Committed:
https://chromium.googlesource.com/chromium/src/+/efe31a69050d5b1f0830124b172f...
==========

[commit-bot: I haz the power, 2017-05-17 00:37:41]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/efe31a69050d5b1f0830124b172f...