Refactor OS_LINUX preprocessor directive for LaCrOS effort.

Currently, ChromeOS defines the OS_LINUX directive as well as
OS_CHROMEOS.  We're working to separate these two, so we're
making the fact that OS_LINUX == OS_LINUX || OS_CHROMEOS
explicit.

Bug: 1110266
Change-Id: Iebbe654853bebeb4af49c9cb793dae5938416f3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2351374
Commit-Queue: Sean McAllister <smcallis@google.com>
Reviewed-by: Drew Wilson <atwilson@chromium.org>
Reviewed-by: Erik Chen <erikchen@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Mike Wittman <wittman@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799710}
GitOrigin-RevId: 0d73ca3d802abb2f3af6eeaa0e830fa7a4c6b0ad
1 file changed