Add more WTF::PtrUtil unit tests

Add more WTF::PtrUtil unit tests

I recently added a unit test to cover a case that was failing.
But the other cases were not covered either.

Write some tests to cover everything in WTF::PtrUtil.

R=yutak@chromium.org
BUG=707089
Review-Url: https://codereview.chromium.org/2787223002
Cr-Commit-Position: refs/heads/master@{#461392}
Committed: https://chromium.googlesource.com/chromium/src/+/9a254ff19df85b20fdc6b6431f9e8cf7f6912cc8

[cblume, 2017-03-31 00:14:41]

The CQ bit was checked by cblume@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-03-31 00:15:31]

Dry run: 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, 2017-03-31 01:34:13]

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

[commit-bot: I haz the power, 2017-03-31 01:34:13]

Dry run: This issue passed the CQ dry run.

[cblume, 2017-03-31 19:53:05]

PTAL

[cblume, 2017-03-31 19:53:57]

cblume@chromium.org changed reviewers:
+ esprehn@chromium.org

[cblume, 2017-03-31 19:53:58]

+Elliot

[Yuta Kitamura, 2017-04-03 07:59:55]

lgtm

[cblume, 2017-04-03 08:23:20]

The CQ bit was checked by cblume@chromium.org

[commit-bot: I haz the power, 2017-04-03 08:23:42]

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, 2017-04-03 09:23:48]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1491207800171520, "parent_rev":
"d2c9e9c9cf5b680bf176400148452bf50b2d6ffd", "commit_rev":
"9a254ff19df85b20fdc6b6431f9e8cf7f6912cc8"}

[commit-bot: I haz the power, 2017-04-03 09:24:34]

Description was changed from

==========
Add more WTF::PtrUtil unit tests

I recently added a unit test to cover a case that was failing.
But the other cases were not covered either.

Write some tests to cover everything in WTF::PtrUtil.

R=yutak@chromium.org
BUG=707089
==========

to

==========
Add more WTF::PtrUtil unit tests

I recently added a unit test to cover a case that was failing.
But the other cases were not covered either.

Write some tests to cover everything in WTF::PtrUtil.

R=yutak@chromium.org
BUG=707089

Review-Url: https://codereview.chromium.org/2787223002
Cr-Commit-Position: refs/heads/master@{#461392}
Committed:
https://chromium.googlesource.com/chromium/src/+/9a254ff19df85b20fdc6b6431f9e...
==========

[commit-bot: I haz the power, 2017-04-03 09:24:35]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/9a254ff19df85b20fdc6b6431f9e...