Convert MimeRegistry to use mojo.

This also adds an optional task runner parameter to
ServiceRegistry::AddService() so mojo service factories can be run on
their preferred thread without needing to write a boilerplate forwarding
function to post to that thread.

BUG=577685

Review-Url: https://codereview.chromium.org/2024363002
Cr-Commit-Position: refs/heads/master@{#397959}


CrOS-Libchrome-Original-Commit: c0fe274f846d0483a7ca32c1ba47875e854f6a1c
1 file changed
tree: 75536b17dbe4b8a5b7f752d76baf7d5610d92bf4
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/