Revert of RenderBlock::layoutPositionedObjects should use setNeedsPositionedMovementLayout

Revert of RenderBlock::layoutPositionedObjects should use setNeedsPositionedMovementLayout (patchset #1 id:1 of https://codereview.chromium.org/414123006/)

Reason for revert:
Reverting this change fixes stable blocking bug: https://crbug.com/413553

Original issue's description:
> 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

TBR=leviw@chromium.org,dsinclair@chromium.org,jchaffraix@chromium.org,abarth@chromium.org
BUG=350756, 413553
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182490

[alancutter (OOO until 2018), 2014-09-23 10:35:50]

Created Revert of RenderBlock::layoutPositionedObjects should use
setNeedsPositionedMovementLayout

[commit-bot: I haz the power, 2014-09-23 10:36:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/598503002/1

[alancutter (OOO until 2018), 2014-09-23 10:36:25]

The CQ bit was unchecked by alancutter@chromium.org

[commit-bot: I haz the power, 2014-09-23 10:36:36]

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

[commit-bot: I haz the power, 2014-09-23 10:36:37]

Failed to apply patch for LayoutTests/fast/repaint/bugzilla-6388-expected.txt:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file LayoutTests/fast/repaint/bugzilla-6388-expected.txt
  Hunk #1 FAILED at 6.
  1 out of 1 hunk FAILED -- saving rejects to file
LayoutTests/fast/repaint/bugzilla-6388-expected.txt.rej

Patch:       LayoutTests/fast/repaint/bugzilla-6388-expected.txt
Index: LayoutTests/fast/repaint/bugzilla-6388-expected.txt
diff --git a/LayoutTests/fast/repaint/bugzilla-6388-expected.txt
b/LayoutTests/fast/repaint/bugzilla-6388-expected.txt
index
5bea6902075937cdd198a869253543f3eaabe026..c334ce7ca066361f9c43092831b5447211ad582a
100644
--- a/LayoutTests/fast/repaint/bugzilla-6388-expected.txt
+++ b/LayoutTests/fast/repaint/bugzilla-6388-expected.txt
@@ -6,6 +6,7 @@
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
+        [8, 130, 100, 100],
         [8, 130, 100, 100]
       ]
     }

[alancutter (OOO until 2018), 2014-09-23 10:38:46]

The CQ bit was checked by alancutter@chromium.org

[commit-bot: I haz the power, 2014-09-23 10:39:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/598503002/140001

[commit-bot: I haz the power, 2014-09-23 12:12:53]

Committed patchset #2 (id:140001) as 182490