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

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}

[nednguyen, 2015-04-09 15:31:03]

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

[commit-bot: I haz the power, 2015-04-09 15:31:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1072053002/1

[commit-bot: I haz the power, 2015-04-09 15:32:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-09 15:33:27]

Patchset 1 (id:??) landed as
https://crrev.com/ac561df1bc7f47f11af6a2569293bdd4942c09b5
Cr-Commit-Position: refs/heads/master@{#324447}

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

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1073873002/ by nednguyen@google.com.

The reason for reverting is: THe original patch actually fixes the problem..