GitLab

Remove deprecated_default_sources_assignment_filter and replace
it with explicit is_win, is_mac, etc. sections.

Bug: 1018739
Change-Id: Icb49329e594d7ea9cf3dd3f467cb1fb58d7911c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2445480Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813652}