cc: Make FixedPositionWithInterveningRenderSurface use property trees

cc: Make FixedPositionWithInterveningRenderSurface use property trees

Previously it was looking at draw_transform which doesn't get filled in
on the main thread by property trees.

Once main thread CDP is removed, Layer::draw_transform can do this work,
and this can be reverted.

R=weiliangc@chromium.org
BUG=502041
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/f6903539e8e879a3eef8da50661f7de12af36e65
Cr-Commit-Position: refs/heads/master@{#343802}

[weiliangc, 2015-08-17 21:04:08]

LGTM

[weiliangc, 2015-08-17 21:04:11]

The CQ bit was checked by weiliangc@chromium.org

[commit-bot: I haz the power, 2015-08-17 21:04:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1295203002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1295203002/1

[commit-bot: I haz the power, 2015-08-17 23:52:02]

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

[commit-bot: I haz the power, 2015-08-17 23:52:03]

Try jobs failed on following builders:
  linux_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/7...)

[enne (OOO), 2015-08-18 00:30:18]

The CQ bit was checked by enne@chromium.org

[commit-bot: I haz the power, 2015-08-18 00:31:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1295203002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1295203002/1

[commit-bot: I haz the power, 2015-08-18 05:10:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-18 05:11:21]

Patchset 1 (id:??) landed as
https://crrev.com/f6903539e8e879a3eef8da50661f7de12af36e65
Cr-Commit-Position: refs/heads/master@{#343802}