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This adds CacheStorage blocking to the list of other storage methods
blocked as part of the cookie blocking process on iOS. To more closely
emulate desktop, it returns a rejected promise with the same error
message.

Bug: 1085123
Change-Id: If6ceed88e601b594c74c2580c26f8a183c9fba7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2247883Reviewed-by: dpapad <dpapad@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Robbie Gibson <rkgibson@google.com>
Cr-Commit-Position: refs/heads/master@{#780187}