Revert of Turn on icu_use_data_file_flag on CrOS

Revert of Turn on icu_use_data_file_flag on CrOS (https://codereview.chromium.org/163793004/)

Reason for revert:
https://chromium-review.googlesource.com/#/c/185937/ has to go in first. 


Original issue's description:
> Turn on icu_use_data_file_flag on CrOS
> 
> See also https://chromium-review.googlesource.com/#/c/185937/
> 
> The switch has to be turned on in two places (chromeos-chrome.ebuild and
> build/common.gypi). One or the other can get landed separately, though.
> 
> BUG=72633
> TEST=net_unittests:*IDN* and base_unittests:*String*
> TBR=mark
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=251213

TBR=mark@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=72633
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=251214

[jungshik at Google, 2014-02-14 00:55:16]

Created Revert of Turn on icu_use_data_file_flag on CrOS

[commit-bot: I haz the power, 2014-02-14 00:56:46]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jshin@chromium.org/165593002/1

[commit-bot: I haz the power, 2014-02-14 00:58:51]

Change committed as 251214

[jungshik at Google, 2014-02-14 01:13:56]

A revert of this CL has been created in
https://codereview.chromium.org/164333003/ by jshin@chromium.org.

The reason for reverting is:
https://chromium-review.googlesource.com/#/c/185937/ just got landed and this CL
can go in now. .

[Mark Mentovai, 2014-02-14 02:06:14]

LGTM (subsequently reverted in https://codereview.chromium.org/164333003/
r251220)