GitLab

DWriteFontProxy is no longer implemented as a message filter but is
a regular Mojo service now.

Rename files from *_message_filter_* to *_impl_*.

Change-Id: I8e5202993c45168636a2e09287f69da397ac5092
Reviewed-on: https://chromium-review.googlesource.com/c/1392345
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619608}