Worker: Set AddressSpace in WorkerShadowPage

WorkerShadowPage's AddressSpace is used for creating outside
FetchClientSettingsObject. Lack of this setting causes CORS failures during
off-the-main-thread worker script fetch when cors-rfc1918 is enabled.

Bug: 945215
Change-Id: I787f23900960ee2bc517403f4b21937e4694da11
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1578138
Reviewed-by: Kenichi Ishibashi <bashi@chromium.org>
Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653089}
4 files changed