Stop deleting ObjectProxy::OnPendingCallIsCompleteData manually

Instead, let libdbus handle it.
This also makes it easier to implement method call cancellation.

BUG=471175

Review URL: https://codereview.chromium.org/1032263002

Cr-Commit-Position: refs/heads/master@{#322746}


CrOS-Libchrome-Original-Commit: 9aa653d4ac52f2c89bfa5164a5eddd8164bb9987
2 files changed
tree: e2d573fe54c4c71400ac5fd919c231a85f7d9f5f
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/