GitLab

Cleaning up weak_ptr_factory destruction order in "src/remoting" module.
WeakPtrFactory should remain the last member so it'll be destroyed
and invalidate its weak pointers before any other members are
destroyed.

BUG=303818

Review URL: https://codereview.chromium.org/551393003

Cr-Commit-Position: refs/heads/master@{#294331}