Refactor and delete IOSurface code

Refactor and delete IOSurface code

Refactor the IOSurface drawing code because it can now safely assume
that the texture it needs to draw is exactly the size of the CALayer.

Delete unused and redundant IOSurface code.

This should have almost no functional change.

BUG=

Committed: https://crrev.com/fb55e5ac47d5914bcd8d69e8651210e27ddf5e02
Cr-Commit-Position: refs/heads/master@{#297756}

[ccameron, 2014-10-01 20:10:37]

ccameron@chromium.org changed reviewers:
+ andresantoso@chromium.org

[ccameron, 2014-10-01 20:11:37]

Less trivial change, but still intended to do nothing functional.

The next change after this will have a big effect (and we'll see if it causes
crashes to re-appear).

[Andre, 2014-10-01 20:33:09]

On 2014/10/01 20:11:37, ccameron1 wrote:
> Less trivial change, but still intended to do nothing functional.
> 
> The next change after this will have a big effect (and we'll see if it causes
> crashes to re-appear).

LGTM. But I'm really not familiar with this code.

[ccameron, 2014-10-01 23:55:52]

Thanks!

[ccameron, 2014-10-02 00:01:18]

The CQ bit was checked by ccameron@chromium.org

[commit-bot: I haz the power, 2014-10-02 00:02:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/623563003/20001

[commit-bot: I haz the power, 2014-10-02 01:05:25]

Committed patchset #2 (id:20001) as 85db4ce7ad1d9c77c76ea099e134075d7f2cdc53

[commit-bot: I haz the power, 2014-10-02 01:06:32]

Patchset 2 (id:??) landed as
https://crrev.com/fb55e5ac47d5914bcd8d69e8651210e27ddf5e02
Cr-Commit-Position: refs/heads/master@{#297756}