Revert of Base: Make TimeDelta constructors deal with overflow.

Revert of Base: Make TimeDelta constructors deal with overflow. (patchset #2 id:20001 of https://codereview.chromium.org/1229853004/)

Reason for revert:
Reverting CL: it seems to cause regression in number of static initializers.
For details see https://code.google.com/p/chromium/issues/detail?id=512348

Original issue's description:
> Base: Make TimeDelta constructors deal with overflow.
>
> BUG=466445
>
> Committed: https://crrev.com/15462e858ebf34721e28a023b0b670c2011183ac
> Cr-Commit-Position: refs/heads/master@{#339605}

TBR=thakis@chromium.org,rvargas@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=466445
Committed: https://crrev.com/6376f12c5c99b2ea7a34abb37684b2ca07c0a587
Cr-Commit-Position: refs/heads/master@{#339641}

[Denis Kuznetsov (DE-MUC), 2015-07-21 12:31:48]

Created Revert of Base: Make TimeDelta constructors deal with overflow.

[commit-bot: I haz the power, 2015-07-21 12:32:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1250453004/1

[commit-bot: I haz the power, 2015-07-21 12:33:04]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-21 12:34:08]

Patchset 1 (id:??) landed as
https://crrev.com/6376f12c5c99b2ea7a34abb37684b2ca07c0a587
Cr-Commit-Position: refs/heads/master@{#339641}