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This CL makes HttpServerProperties methods that deal with broken alt
services take NetworkIsolationKeys, and wires through through to the
BrokenAlternativeServices object it owns. This CL also updates
HttpServerPropertiesManager to save/load the NetworkIsolationKey
associated with each broken alt service.

Bug: 969890
Change-Id: I81909c8a3965d510fe775e7ccadebd4d88e5a7da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1775260
Commit-Queue: Matt Menke <mmenke@chromium.org>
Reviewed-by: Zhongyi Shi <zhongyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695200}