Temporarily disable baseLayoutStyle optimization.

Temporarily disable baseLayoutStyle optimization.

In order to figure out more about how the baseRenderStyle validity assert
triggers in the wild, we'll try to temporarily make a RELEASE_ASSERT out
of it.

This means we'll effectively disable the optimization, yet clone a
baseLayoutStyle to be able to check that the optimization would have been
sound.

Performance tests may intentionally degrade as a consequence.

R=esprehn@chromium.org
BUG=463413
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=192378

[rune, 2015-03-13 13:29:07]

This should not land before [1] to avoid known assertions.

[1] https://codereview.chromium.org/1000413003/

[esprehn, 2015-03-16 19:56:10]

lgtm

[rune, 2015-03-16 21:46:19]

On 2015/03/16 19:56:10, esprehn wrote:
> lgtm

Thanks. I'll hold off landing until the known issue is fixed as mentioned above.

[rune, 2015-03-23 17:24:54]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2015-03-23 17:25:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1001323003/1

[commit-bot: I haz the power, 2015-03-23 18:49:51]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=192378