This patch is a follow up to https://webrtc-review.googlesource.com/c/src/+/260943
which made it possible to destroy a Port before a Connection (on that
port).
This patch "reverses" this, by adding RTC_DHECK, and fixes the Port
destructor to release the Connections before invalidating the WeakPtr<>.
Currently there are no known occurrences where a Connection is destroyed after it's Port is. But prior to the change in Port destructor, a bunch unit tests failed on the newly added DCHECKs.
In addition:
a) modify StunReqquestManager to remove entry from hash before calling callback. This makes it possible for callback to modify (clear) hash.
b) clear pending requests when disconnecting from port, "should not be needed", depends on a)
c) add a getter for pending_delete()
Bug: webrtc:13892, webrtc:13865
Change-Id: I5d18f2db8d93b7cc25d18bd620063589ee9257c9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/322861
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40907}
c4f3919fdd