RenderBlock::layoutPositionedObjects should use setNeedsPositionedMovementLayout

RenderBlock::layoutPositionedObjects should use setNeedsPositionedMovementLayout

This CL swiches RenderBlock::layoutPositionedObjects from using setNeedsLayout
to setNeedsPositionedMovementLayout, as indicated by the FIXME comment and
associated bug. The test failure mentioned in the bug is no longer a problem.

BUG=350756
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=179289

[abarth-chromium, 2014-07-30 21:39:57]

Depends on https://codereview.chromium.org/429363002

[Julien - ping for review, 2014-07-30 22:36:22]

lgtm

[abarth-chromium, 2014-07-30 22:50:15]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-07-30 22:51:05]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/abarth@chromium.org/414123006/1

[commit-bot: I haz the power, 2014-07-31 00:30:52]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/19759)

[leviw_travelin_and_unemployed, 2014-07-31 00:32:26]

Hooray! LGTM!

[commit-bot: I haz the power, 2014-07-31 01:38:16]

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

[commit-bot: I haz the power, 2014-07-31 01:38:17]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/19785)

[abarth-chromium, 2014-07-31 04:34:39]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-07-31 04:35:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/abarth@chromium.org/414123006/1

[commit-bot: I haz the power, 2014-07-31 05:38:23]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/19818)

[commit-bot: I haz the power, 2014-07-31 06:11:21]

Change committed as 179289

[alancutter (OOO until 2018), 2014-09-23 10:35:49]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/598503002/ by alancutter@chromium.org.

The reason for reverting is: Reverting this change fixes stable blocking bug:
https://crbug.com/413553.