[CrOS SplitSettings] Fix is_win language restart button and description.

PageVisibility is undefined for windows, so the restart button and
description associated with switching Google Chrome UI language are
preprocessed out, which is not intended.  This CL ensures that
PageVisibility will not be considered when building for windows.

Change-Id: Ib418acdd6b7e747dbab7f3e3db0e38c6166306be
Bug: 974424
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1663325
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: May Lippert <maybelle@chromium.org>
Commit-Queue: Regan Hsu <hsuregan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672196}
2 files changed