Style changes shouldn't cause RenderLayerCompositor to rebuild its tree

Style changes shouldn't cause RenderLayerCompositor to rebuild its tree

Before this CL, if you changed the style on a RenderLayer that was directly
composited, we would trigger a rebuild of the entire compositing tree as part
of the "chicken-egg hacks." There's no reason for that. Instead, we simply need
to do a geometry update after changing style.

This makes the compositing update in the calculator faster by 7%.

R=ojan@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170515

[abarth-chromium, 2014-04-01 00:47:41]

I need to measure exactly how much this change saves us on the calculator.

[ojan, 2014-04-01 01:03:38]

lgtm

[commit-bot: I haz the power, 2014-04-01 01:03:49]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/220193003/1

[abarth-chromium, 2014-04-01 01:09:06]

The CQ bit was unchecked by abarth@chromium.org

[abarth-chromium, 2014-04-01 01:15:48]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-04-01 01:16:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/220193003/1

[commit-bot: I haz the power, 2014-04-01 01:38:17]

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

[commit-bot: I haz the power, 2014-04-01 01:38:17]

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

[abarth-chromium, 2014-04-01 01:55:12]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-04-01 01:55:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/220193003/1

[commit-bot: I haz the power, 2014-04-01 02:20:18]

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

[commit-bot: I haz the power, 2014-04-01 02:20:18]

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

[abarth-chromium, 2014-04-01 02:21:12]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-04-01 02:21:17]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/220193003/1

[commit-bot: I haz the power, 2014-04-01 03:30:04]

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

[commit-bot: I haz the power, 2014-04-01 03:30:05]

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

[abarth-chromium, 2014-04-01 04:29:46]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-04-01 04:29:52]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/220193003/1

[commit-bot: I haz the power, 2014-04-01 05:01:20]

Change committed as 170515