GitLab

This CL converts SpellCheckHost and SpellChecker to
new Mojo types using Remote, PendingRemote, PendingReceiver,
Receiver, and ReceiverSet.

It introduces a new template for GetInterface from
LocalInterfaceProvider.

Bug: 955171
Change-Id: I459d2ffc50242f8f2159c31212fd2346e571544f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1813125
Commit-Queue: Julie Kim <jkim@igalia.com>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Reviewed-by: Tim Volodine <timvolodine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699213}