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This change makes it possible to reprioritize socket pool ConnectJobs
to match their corresponding Requests. For TransportConnectJobs that are
reprioritized while undergoing host resolution, the corresponding host
resolver request is also reprioritized to match the connect job.

Bug: 166689
Change-Id: Icaed423c6f363fa15e9e379aa135a3b98330d1a1
Reviewed-on: https://chromium-review.googlesource.com/c/1320210
Commit-Queue: Lily Chen <chlily@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606129}