Don't initialize the incompatible applications warning in Win8 and under

The feature was never meant to be enabled on other versions than
Windows 10, but I accidentally removed the checks in
https://chromium-review.googlesource.com/c/chromium/src/+/1099976.

Bug: 717696
Change-Id: Ie52736de5dbf609fb702f6aff4a97f8ecac95267
Reviewed-on: https://chromium-review.googlesource.com/1144430
Commit-Queue: Patrick Monette <pmonette@chromium.org>
Reviewed-by: Chris Hamilton <chrisha@chromium.org>
Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576957}
3 files changed