Ensure menu item ordering for DbusMenu::OnGetGroupProperties

Ubuntu's top bar expects properties returned in the order they were
requested.  The returned properties have IDs associated with them, so
ordering really shouldn't be necessary. Alas, keep them ordered to
appease Unity.

BUG=981201
R=thestig

Change-Id: I2907c264cc4346a47aa6304f7302c6d58555c9cb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1716958
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682553}
1 file changed