Remove proxy traffic annotations from ClientSocketPool::SocketParams.

We're working on removing SocketParams. Instead, pass the annotations
directly to the SocketPool as part of a request.

Bug: 955125
Change-Id: If124df4de192b6682119b570a33c61ebf18c9e09
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1578059
Commit-Queue: Matt Menke <[email protected]>
Reviewed-by: Eric Roman <[email protected]>
Cr-Commit-Position: refs/heads/master@{#653397}
24 files changed