GitLab

Since we cannot combine mixins, these mixins contain the different
combinations that we will use.

R=tikuta@chromium.org, ukai@chromium.org, yyanagisawa@chromium.org

Bug: 913249
Change-Id: Ic5efaba32650173f6a1905903ec8a2ac116a7d83
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1598898Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Simon Que <sque@chromium.org>
Cr-Commit-Position: refs/heads/master@{#657643}