GitLab

This reverts commit 50f1686c.

Reason for revert: Failure on Linux ChromiumOS MSan Tests

Bug:1047641

Original change's description:
> Create ResolveContext
> 
> This object stores per-context state for use in host resolution. In
> subsequent CLs, it will be passed through the stack instead of how raw
> URLRequestContext* is passed today.
> 
> Will soon be responsible for some data currently stored per-session in
> DnsSession (in this CL, implementing the DoH probe results, but not yet
> using the moved results). Because that data will be both per-context
> and per-session, but because we really only care about it in the most
> recent "active" session, ResolveContext keeps track of the "current"
> session and compares session on manipulation or retrieval of the
> per-session data.
> 
> Bug: 1022059
> Change-Id: Iad75fd590c929357415cce1aee2984355a7df251
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2003256
> Commit-Queue: Eric Orth <ericorth@chromium.org>
> Reviewed-by: Matt Menke <mmenke@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#737109}

TBR=mmenke@chromium.org,ericorth@chromium.org

Change-Id: I2b48afc66abd59eff8a3bec653013c6e3a6f9738
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1022059
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2031040Reviewed-by: Ioana Pandele <ioanap@chromium.org>
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737274}