Revert 176659

      > Fix creating target paths in file_util_posix CopyDirectory.
> 
> BUG=167840
> 
> 
> Review URL: https://chromiumcodereview.appspot.com/11773018

TBR=aedla@chromium.org
Review URL: https://codereview.chromium.org/11877016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176661 0039d316-1c4b-4281-b951-d872f2087c98