Version: 56.0.2905.0 (Canary).
OS: Mac OS X 10.11

What steps will reproduce the problem?
(1) Launch chrome
(2) Visit chrome://site-engagement

What is the expected output?

Renderer does not crash (it did not crash in 56.0.2902.0)

What do you see instead?

Renderer crashes. Running Chrome from the command line gives the following output in the terminal:

[64212:1295:1101/112959:ERROR:interface_registry.cc(160)] InterfaceProviderSpec "navigation:frame" prevented service: service:content_renderer from binding interface: media_router::mojom::MediaRouter exposed by: service:content_browser
[64212:1295:1101/112959:ERROR:render_process_host_impl.cc(2980)] Terminating render process for bad Mojo message: Received bad user message: InterfaceProviderSpec "navigation:frame" prevented service: service:content_renderer from binding interface: media_router::mojom::MediaRouter exposed by: service:content_browser
[64212:1295:1101/112959:ERROR:bad_message.cc(23)] Terminating renderer for bad IPC message, reason 123

Is this due to a recent mojo change or is it a bug in the media router mojo implementation?