Remove useless references to unsupported windows versions (5)

This CL goes over the base/ and chrome/ directory.

Bug: 579196
Change-Id: Icc97c5709072e833a62c1e0f75a28f2917d1dd19
Reviewed-on: https://chromium-review.googlesource.com/565962
Commit-Queue: Patrick Monette <pmonette@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486502}
29 files changed