Change newly added OVERRIDE to override in //extensions

Change newly added OVERRIDE to override in //extensions

BUG=417463
Committed: https://crrev.com/114fa843396eb4188ae1f2cf182892e36e4ea980
Cr-Commit-Position: refs/heads/master@{#298975}

[Xi Han, 2014-10-09 17:18:42]

hanxi@chromium.org changed reviewers:
+ mostynb@opera.com, rockot@chromium.org

[Xi Han, 2014-10-09 17:18:43]

Hi Ken & Mostyn:
A update of the status of the following two files in CL(638173002):
-extensions/browser/extension_network_delegate.h was renamed and moved to
extensions/shell/browser/shell_network_delegate.h;
-extensions/browser/extension_url_request_context_getter.h ->
extensions/shell/browser/shell_url_request_context_getter.h.

The "OVERRIDE" keyword in the shell_url_request_context_getter.h has been
updated in a my CL, so only the shell_network_delegate.h needs to be updated in
this CL.

Thank you for noticing me this coding style change.

[Mostyn Bramley-Moore, 2014-10-09 17:33:24]

lgtm

[Ken Rockot(use gerrit already), 2014-10-09 19:46:11]

lgtm

[Xi Han, 2014-10-09 19:46:30]

The CQ bit was checked by hanxi@chromium.org

[commit-bot: I haz the power, 2014-10-09 19:48:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/642083002/1

[commit-bot: I haz the power, 2014-10-09 20:47:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-09 20:48:26]

Patchset 1 (id:??) landed as
https://crrev.com/114fa843396eb4188ae1f2cf182892e36e4ea980
Cr-Commit-Position: refs/heads/master@{#298975}