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Read the bundle path and version from the latest GetScriptsForUrl call,
and store it in the service's state. Forward them in the Initial
request's ScriptStoreConfig.

Change-Id: I80aef768ea893146af42f6671a03379356bdcf67
Bug: b/174227808
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2582118
Commit-Queue: Ernest Galbrun <galbrun@google.com>
Reviewed-by: Clemens Arbesser <arbesser@google.com>
Cr-Commit-Position: refs/heads/master@{#837998}