Update {virtual,override} to follow C++11 style in components.

Update {virtual,override} to follow C++11 style in components.

The Google style guide states that only one of {virtual,override,final} should be used for each declaration, since override implies virtual and final implies both virtual and override.

This patch was manually generated using a regex and a text editor.

BUG=417463
Committed: https://crrev.com/79ff566325268a34a0ce078dbda3ea68d21850de
Cr-Commit-Position: refs/heads/master@{#327312}

[ncarter (slow), 2015-04-22 21:11:56]

nick@chromium.org changed reviewers:
+ blundell@chromium.org

[ncarter (slow), 2015-04-22 21:12:59]

On 2015/04/22 21:11:57, ncarter wrote:

Whoops -- please do not review. This patch has compile issues (probably merge
conflicts) I'll need to sort out.

[ncarter (slow), 2015-04-22 21:13:08]

nick@chromium.org changed reviewers:
- blundell@chromium.org

[tfarina, 2015-04-22 21:20:08]

Could you include the regex in the cl description? It is useful for others.

[ncarter (slow), 2015-04-22 21:27:18]

On 2015/04/22 21:20:08, tfarina wrote:
> Could you include the regex in the cl description? It is useful for others.

I was mostly finding matches using these two:

\n[^\n/]+virtual [^;{]+ [A-Z][a-zA-Z0-9_]*\([^;{]+ override[ \n]*[;{]
virtual [^;{]+ [A-Z][a-zA-Z0-9_]*\([^;{]+ override[ \n]*[;{]

...which are far from perfect, but it catches a few places that the clang plugin
had trouble with (including template functions, objects using gmock in some
way). The second one has lots of false positives but finds code-in-comments.

[ncarter (slow), 2015-04-24 20:24:34]

nick@chromium.org changed reviewers:
+ caitkp@chromium.org

[ncarter (slow), 2015-04-24 20:24:34]

caitkp: Please review! Thanks.

[ncarter (slow), 2015-04-27 22:05:40]

On 2015/04/24 20:24:34, ncarter wrote:
> caitkp: Please review! Thanks.

caitkp: friendly ping on this boring, boring CL.

[Cait (Slow), 2015-04-28 13:59:01]

LGTM -- thanks for the clean-up!

[Nico, 2015-04-28 16:19:25]

The CQ bit was checked by thakis@chromium.org

[commit-bot: I haz the power, 2015-04-28 16:19:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1056633004/40001

[commit-bot: I haz the power, 2015-04-28 17:22:27]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-04-28 17:23:22]

Patchset 3 (id:??) landed as
https://crrev.com/79ff566325268a34a0ce078dbda3ea68d21850de
Cr-Commit-Position: refs/heads/master@{#327312}