Mojo: Remove MessagePipe::OnRemove(); instead just use MessagePipe::Close().

R=brettw@chromium.org

Review URL: https://codereview.chromium.org/612183002

Cr-Commit-Position: refs/heads/master@{#297479}


CrOS-Libchrome-Original-Commit: 526afc35098032c429b565df75da6beecd4f424e
4 files changed
tree: 3019e6a6a4dbdd2339102747758a46442c074314
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/