Worker: Remove AddressSpace param from WorkerClassicScriptLoader

WorkerClassicScriptLoader takes fetch client's ResourceFetcher that provides
fetch client's AddressSpace, so it doesn't have to take AddressSpace as a param.

Bug: 878274, 945215
Change-Id: I3ca0ccc7834522fc627f7af746fc6d632629d7eb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1578145
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653394}
9 files changed