cc: Minor clean ups to ETC1PixelRef header.

cc: Minor clean ups to ETC1PixelRef header.

- remove unnecessary includes
- use chromium OVERRIDE macro instead of skia SK_OVERRIDE.
- use DISALLOW_COPY_AND_ASSIGN macro.

BUG=None
TEST=cc_unittests
R=enne@chromium.org,jamesr@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=234110

[tfarina, 2013-11-09 01:07:43]

I was grepping for 'ownership' and happened to look at this header file.

Please, take a look.

Thanks!

[aelias_OOO_until_Jul13, 2013-11-09 02:28:16]

OK, this was just added today in https://codereview.chromium.org/41903003/ and I
missed these issues in my review.  lgtm.

[commit-bot: I haz the power, 2013-11-09 02:30:30]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tfarina@chromium.org/67613002/1

[commit-bot: I haz the power, 2013-11-09 05:14:35]

Change committed as 234110

[powei, 2013-11-09 08:01:15]

On 2013/11/09 05:14:35, I haz the power (commit-bot) wrote:
> Change committed as 234110

Yes.  Sorry I missed these in the original patch.  Thank you for cleaning this
up.