GitLab

This is required because inbound Mojo messages which do not have
a registered handler are considered an error, and the render process
is terminated.

Bug: 1090429
Change-Id: I6979013e55a32f30bb32f2918df5fde8ba852dbc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2530198
Commit-Queue: Peter Kvitek <kvitekp@chromium.org>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Chris Mumford <cmumford@google.com>
Cr-Commit-Position: refs/heads/master@{#827868}