There seems a case where we don't set `most_recent_tcp_error_` after
all TCP attempts are failed. Reported minidumps don't contain enough
information to identify the cause. This CL adds some
base::debug::Alias to identify the cause.
Bug: 403373872
Change-Id: I7161d2e8703c58d6640b67cf638157d4481447e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6395996
Reviewed-by: Nidhi Jaju <nidhijaju@chromium.org>
Commit-Queue: Kenichi Ishibashi <bashi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1437943}
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