Update {virtual,override,final} for base to follow C++11 style.

Update {virtual,override,final} for base to follow C++11 style.

This patch was automatically generated using a variation of
https://codereview.chromium.org/598073004

BUG=417463
Committed: https://crrev.com/769b4bf3c99510a8e9ff47f4fd1f6f1054097eb2
Cr-Commit-Position: refs/heads/master@{#310660}

[dcheng, 2015-01-08 23:37:30]

[email protected] changed reviewers:
+ [email protected]

[Nico, 2015-01-08 23:39:11]

lgtm

This lgtm was generated automatically by the equivalent of a very short shell
script.

[dcheng, 2015-01-08 23:42:10]

The CQ bit was checked by [email protected]

[commit-bot: I haz the power, 2015-01-08 23:44:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/842993002/1

[commit-bot: I haz the power, 2015-01-09 01:47:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-09 01:50:11]

Patchset 1 (id:??) landed as
https://crrev.com/769b4bf3c99510a8e9ff47f4fd1f6f1054097eb2
Cr-Commit-Position: refs/heads/master@{#310660}