Revert 258278 "Use ICU data file on Android WebView."
> Use ICU data file on Android WebView.
>
> The Android WebView uses the system ICU on target anyway, so this only
> affects the host build of ICU used to build the host V8. This means the
> flag is now enabled on all platforms by default and no longer needs to
> be conditional.
>
> BUG=
>
> Review URL: https://codereview.chromium.org/
204783003
TBR=torne@chromium.org
Review URL: https://codereview.chromium.org/
206713002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@258354 0039d316-1c4b-4281-b951-d872f2087c98