Remove arraysize.h gcc hack and Chromium override.

Remove arraysize.h gcc hack and Chromium override.

Part of work removing dependency on Chromium's base.

BUG=468375
(in particular comment #37)

Committed: https://crrev.com/3dfe5d3d41d7b2f7de594b383d23a328303f3436
Cr-Commit-Position: refs/heads/master@{#9880}

[Henrik Grunell WebRTC, 2015-09-07 10:33:07]

henrikg@webrtc.org changed reviewers:
+ andrew@webrtc.org, tommi@webrtc.org

[Henrik Grunell WebRTC, 2015-09-07 10:34:01]

I don't know the story behind this gcc hack, but Chromium doesn't have it
anymore and I'm hoping we don't need it either.

[tommi, 2015-09-07 11:53:37]

lgtm

[Andrew MacDonald, 2015-09-07 22:27:55]

lgtm

The overrides are moving to Chromium's third_party/webrtc_overrides, right?

[Henrik Grunell WebRTC, 2015-09-08 07:56:17]

On 2015/09/07 22:27:55, Andrew MacDonald wrote:
> lgtm
> 
> The overrides are moving to Chromium's third_party/webrtc_overrides, right?

Yes.

[Henrik Grunell WebRTC, 2015-09-08 07:56:28]

The CQ bit was checked by henrikg@webrtc.org

[commit-bot: I haz the power, 2015-09-08 07:56:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1327023002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1327023002/1

[commit-bot: I haz the power, 2015-09-08 07:57:37]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-08 07:57:52]

Patchset 1 (id:??) landed as
https://crrev.com/3dfe5d3d41d7b2f7de594b383d23a328303f3436
Cr-Commit-Position: refs/heads/master@{#9880}