Split NetLog part of QuicConnectionLogger into QuicEventLogger.

This is a primarily no-op change to aid adding support for NetLog
into QuicTransportClient.

Bug: 1114027
Change-Id: I06c449c3cc977789a1d28c5320905ca4ffd2be3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2342483
Reviewed-by: David Schinazi <dschinazi@chromium.org>
Commit-Queue: Victor Vasiliev <vasilvv@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#796035}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 44b9422706fb794d35b536c2094b4cd891f42f13
5 files changed