Remove code to implement Http09OnNonDefaultPortsEnabled policy.

This policy was deprecated in Chrome 77, and slated for removal in
Chrome 78.  Chrome 77 has hit stable, so it should be fine to actually
remove it.

Bug: 976751
Change-Id: If4e9ced9089f7769fb886e7bcf8c207a7adcab1f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1807176
Reviewed-by: Pavol Marko <[email protected]>
Reviewed-by: Ken Buchanan <[email protected]>
Reviewed-by: Eric Roman <[email protected]>
Commit-Queue: Matt Menke <[email protected]>
Cr-Commit-Position: refs/heads/master@{#698159}
21 files changed