GitLab

Explain that chromeos_is_browser_only is set on ChromeOS when using Wayland.

Change-Id: I7649ef51b8c7759f4dfed0021bf32bcc2c8f6886
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2324663Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#792502}