Return first_run_win to using the Chrome path provider to look up the user data dir.

This changed in https://chromiumcodereview.appspot.com/10837222/ which causes a regression when the user data dir is overridden via GP.

BUG=161336
TEST=Have a group policy set to move the user data dir elsewhere. Ensure that repeated Chrome launches do not go through the first run flow.

Review URL: https://chromiumcodereview.appspot.com/11299038

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@168531 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed