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Change QUIC ConnectionCloseError histograms to break out errors for Google hosts in an attempt to diagnose some unexpected errors.

Change-Id: I56a795474abda715025b7fbf015d4880537c8748
Reviewed-on: https://chromium-review.googlesource.com/c/1303045Reviewed-by: Nick Harper <nharper@chromium.org>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Commit-Queue: Ryan Hamilton <rch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604118}