Revert of Revert of Re-subimission of https://codereview.chromium.org/1041213003/

Revert of Revert of Re-subimission of https://codereview.chromium.org/1041213003/ (patchset #1 id:1 of https://codereview.chromium.org/1072053002/)

Reason for revert:
THe original patch actually fixes the problem.

Original issue's description:
> Revert of Re-subimission of https://codereview.chromium.org/1041213003/ (patchset #2 id:20001 of https://codereview.chromium.org/1056533003/)
>
> Reason for revert:
> Speculative revert (https://code.google.com/p/chromium/issues/detail?id=474977)
>
> BUG=474977
>
> Original issue's description:
> > Re-subimission of https://codereview.chromium.org/1041213003/
> >
> > 1. Use window.performance.timing instead of statsCollectionController to get page loading time.
> > 2. Fix waiting condition to avoid racing condition
> >
> > BUG=472603, 467964
> >
> > Committed: https://crrev.com/ad8d3f3d9182bb82f89c5d29e0c455d8deb8c15a
> > Cr-Commit-Position: refs/heads/master@{#324118}
>
> TBR=dtu@chromium.org,aiolos@chromium.org,cylee@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=472603, 467964
>
> Committed: https://crrev.com/ac561df1bc7f47f11af6a2569293bdd4942c09b5
> Cr-Commit-Position: refs/heads/master@{#324447}

TBR=dtu@chromium.org,aiolos@chromium.org,cylee@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=474977
Committed: https://crrev.com/e194cbe2f71dc374a20ebe75d49a1c7d39da42dc
Cr-Commit-Position: refs/heads/master@{#324473}

[nednguyen, 2015-04-09 18:06:29]

Created Revert of Revert of Re-subimission of
https://codereview.chromium.org/1041213003/

[commit-bot: I haz the power, 2015-04-09 18:07:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1073873002/1

[commit-bot: I haz the power, 2015-04-09 18:09:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-09 18:10:16]

Patchset 1 (id:??) landed as
https://crrev.com/e194cbe2f71dc374a20ebe75d49a1c7d39da42dc
Cr-Commit-Position: refs/heads/master@{#324473}