Revert of Invalidate as DisplayItemClient when PaintLayer is setNeedsRepaint

Revert of Invalidate as DisplayItemClient when PaintLayer is setNeedsRepaint (patchset #3 id:40001 of https://codereview.chromium.org/2071053003/ )

Reason for revert:
Based on r400605 that is to be reverted.

Original issue's description:
> Invalidate as DisplayItemClient when PaintLayer is setNeedsRepaint
> 
> This is mainly for PaintController to check cache validaty when copying
> cached subsequence.
> 
> BUG=609218
> 
> Committed: https://crrev.com/72f6d81fceb5bce77d87042b305fe0d3d361e3c7
> Cr-Commit-Position: refs/heads/master@{#400606}

TBR=chrishtr@chromium.org,wangxianzhu@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=609218

[vasilii, 2016-06-20 10:35:51]

The CQ bit was checked by vasilii@chromium.org

[vasilii, 2016-06-20 10:35:52]

Created Revert of Invalidate as DisplayItemClient when PaintLayer is
setNeedsRepaint

[commit-bot: I haz the power, 2016-06-20 10:36:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2080683002/1

[vasilii, 2016-06-20 11:19:02]

The CQ bit was unchecked by vasilii@chromium.org