GitLab

Move UnfreezableFrameMsg_DeleteProxy to be a method on the
RemoteFrame. This is possible because associated channel messages
are not currently frozen.

BUG=993189

Change-Id: I9b09706686d4dc1b6bf7f499f1f5f90224380c39
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2527517
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841565}