Revert of Revert of Report viewport memory and timing correctly for Slimming Paint.

Revert of Revert of Report viewport memory and timing correctly for Slimming Paint. (patchset #1 id:1 of https://codereview.chromium.org/885753004/)

Reason for revert:
This CL wasn't the culprit after all, it seems.

Original issue's description:
> Revert of Report viewport memory and timing correctly for Slimming Paint. (patchset #3 id:60001 of https://codereview.chromium.org/867803003/)
>
> Reason for revert:
> Reverting due to https://crbug.com/453131
>
> Original issue's description:
> > Report viewport memory and timing correctly for Slimming Paint.
> >
> > The rasterize_and_record benchmark was not using data from the
> > DisplayItemList. Now it does.
> >
> > R=ajuma@chromium.org,vmpstr@chromium.org
> > BUG=451448
> >
> > Committed: https://crrev.com/c76f528131949d7fe60b7facf1e7b40362aacfd5
> > Cr-Commit-Position: refs/heads/master@{#313420}
>
> TBR=ajuma@chromium.org,vmpstr@chromium.org,schenney@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=451448
>
> Committed: https://crrev.com/fae3da55913e8e163faabf787b26791a96938ab7
> Cr-Commit-Position: refs/heads/master@{#314226}

TBR=ajuma@chromium.org,vmpstr@chromium.org,schenney@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=451448
Committed: https://crrev.com/0dd0f0b4f8cac807241696e42250be96b1f2de56
Cr-Commit-Position: refs/heads/master@{#314260}

[oystein (OOO til 10th of July), 2015-02-03 03:30:38]

Created Revert of Revert of Report viewport memory and timing correctly for
Slimming Paint.

[commit-bot: I haz the power, 2015-02-03 03:31:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/886673003/1

[commit-bot: I haz the power, 2015-02-03 03:32:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-03 03:34:02]

Patchset 1 (id:??) landed as
https://crrev.com/0dd0f0b4f8cac807241696e42250be96b1f2de56
Cr-Commit-Position: refs/heads/master@{#314260}