GitLab

This CL converts ApplicationMediaCapabilitiesObserverPtr to
new Mojo types. It uses Receiver, RemoteSet, and PendingRemote
or Remote instead of Binding, InterfacePtrSet and
ApplicationMediaCapabilitiesObserverPtr.

Bug: 955171
Change-Id: I95a366faed461a5108f1abea78a4ee8ebf973aec
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1787673
Commit-Queue: Julie Kim <jkim@igalia.com>
Reviewed-by: Sam McNally <sammc@chromium.org>
Reviewed-by: Oksana Zhuravlova <oksamyt@chromium.org>
Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695550}