Revert of Enable icu_use_data_file on Windows

Revert of Enable icu_use_data_file on Windows (https://codereview.chromium.org/99473012/)

Reason for revert:
mini_installer somehow does not install icudtl.dat in the top product directory (alongside chrome.exe) leading to a failure in InitializeICU(). 

icudtl.dat is listed in both mini_installer.gypi and FILES.cfg for windows.


Original issue's description:
> Enable icu_use_data_file on Windows
> 
> 
> Set icu_use_data_file_flag to 1 on Windows in common.gypi and make the dependency on icudata conditional on 'icu_use_data_file_flag != 0' in common.gypi, base.gyp and net.gyp
> 
> This also requires a change in third_party/icu/icu.gyp
> ( https://codereview.chromium.org/111723007/ ), which was rolled in by https://codereview.chromium.org/118313004/
> 
> BUG=72633
> TEST=All windows builds work fine and there's no perf regression (start-up etc).
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=246387

TBR=mark@chromium.org,scottmg@chromium.org,laforge@chromium.org,maruel@chromium.org,grt@chromium.org,wtc@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=72633
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=246632

[jungshik at Google, 2014-01-23 17:42:50]

Created Revert of Enable icu_use_data_file on Windows

[commit-bot: I haz the power, 2014-01-23 17:43:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jshin@chromium.org/139403006/1

[commit-bot: I haz the power, 2014-01-23 17:43:50]

Change committed as 246632