Put the squashing layer underneath the ancestor clipping layer if present.

Put the squashing layer underneath the ancestor clipping layer if present.

Previously, this was the case for m_graphicsLayer but not m_squashingLayer.
Since they now are guaranteed to have the same clipping ancestor, this is both
safe and correct.

BUG=336563
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170348

[Ian Vollick, 2014-03-27 23:48:37]

On 2014/03/27 23:41:44, chrishtr wrote:

Can we avoid creating the squashing containment layer if we've got an ancestor
clipping layer?

[chrishtr, 2014-03-27 23:53:21]

I think so. Will make that change.

[chrishtr, 2014-03-28 00:38:17]

Done. PTAL.

[Ian Vollick, 2014-03-28 01:06:39]

On 2014/03/28 00:38:17, chrishtr wrote:
> Done. PTAL.

LGTM, but I don't think that the bots can handle the ^^ fanciness :)

[chrishtr, 2014-03-28 01:09:05]

The CQ bit was checked by chrishtr@chromium.org

[commit-bot: I haz the power, 2014-03-28 01:09:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/chrishtr@chromium.org/215823002/100001

[commit-bot: I haz the power, 2014-03-28 01:23:06]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-03-28 01:23:07]

Try jobs failed on following builders:
  tryserver.blink on linux_blink_dbg

[chrishtr, 2014-03-28 17:06:25]

The CQ bit was checked by chrishtr@chromium.org

[commit-bot: I haz the power, 2014-03-28 17:06:36]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/chrishtr@chromium.org/215823002/120001

[commit-bot: I haz the power, 2014-03-28 18:08:34]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-03-28 18:08:34]

Try jobs failed on following builders:
  tryserver.blink on win_blink_rel

[chrishtr, 2014-03-28 18:18:14]

The CQ bit was checked by chrishtr@chromium.org

[commit-bot: I haz the power, 2014-03-28 18:18:20]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/chrishtr@chromium.org/215823002/120001

[commit-bot: I haz the power, 2014-03-28 19:01:35]

Change committed as 170348

[Ian Vollick, 2014-03-29 09:35:12]

A revert of this CL has been created in
https://codereview.chromium.org/218313002/ by vollick@chromium.org.

The reason for reverting is: This appears to have unexpected effects on
rendering. Bits of gmail are missing for example..