Enable template checking for the clang plugin on Linux.

Enable template checking for the clang plugin on Linux.

This enables the plugin to check templated classes for the following
things:
- virtual functions have {virtual,override,final} correctly specified.
- Refcounted types have private destructors.
- WeakPtrFactory members are the last members

BUG=441916
Committed: https://crrev.com/0d701b22f23d3ffc0ef40ff343a1128b64ec392d
Cr-Commit-Position: refs/heads/master@{#331210}

[dcheng, 2015-05-22 18:10:48]

dcheng@chromium.org changed reviewers:
+ thakis@chromium.org

[dcheng, 2015-05-22 18:10:49]

Seems to build, so why not.

[Nico, 2015-05-22 18:21:40]

can you add a short description of the practical effects of this to the cl
description?

[dcheng, 2015-05-22 18:28:15]

On 2015/05/22 at 18:21:40, thakis wrote:
> can you add a short description of the practical effects of this to the cl
description?

Done.

[Nico, 2015-05-22 18:56:19]

lgtm

[dcheng, 2015-05-22 18:56:36]

The CQ bit was checked by dcheng@chromium.org

[dcheng, 2015-05-22 18:56:46]

The CQ bit was unchecked by dcheng@chromium.org

[dcheng, 2015-05-22 18:57:50]

The CQ bit was checked by dcheng@chromium.org

[dcheng, 2015-05-22 18:57:51]

The patchset sent to the CQ was uploaded after l-g-t-m from thakis@chromium.org
Link to the patchset: https://codereview.chromium.org/1156533004/#ps20001
(title: "Fix bug #s")

[commit-bot: I haz the power, 2015-05-22 19:00:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1156533004/20001

[commit-bot: I haz the power, 2015-05-23 00:10:13]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-05-23 00:10:55]

Patchset 2 (id:??) landed as
https://crrev.com/0d701b22f23d3ffc0ef40ff343a1128b64ec392d
Cr-Commit-Position: refs/heads/master@{#331210}

[dmichael (off chromium), 2015-05-23 03:53:47]

dmichael@chromium.org changed reviewers:
+ dmichael@chromium.org

[dmichael (off chromium), 2015-05-23 03:53:47]

Woo! Thanks for picking this up. Sorry I wasn't able to push it over the goal
line... and I'm glad nothing on Linux regressed.