M96: [FileAPI] Move origin checks in BlobURLStore sooner.

Rather than waiting to verify if a valid origin was passed in until
register/revoke time, check if the origin is valid at the time the
mojo interface is requested. This avoids the need to pass the
delegate on to BlobURLStoreImpl, further decoupling this from
BlobRegistryImpl.

(cherry picked from commit 15cfa2bed3ce9dcdd0a06d3cd3b8330e3591acdc)

Bug: 1262183
Change-Id: I4889685d03501158abfe4f87c647dc468d005f78
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3264353
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#940015}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3285385
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/4664@{#1078}
Cr-Branched-From: 24dc4ee75e01a29d390d43c9c264372a169273a7-refs/heads/main@{#929512}

• chrome/browser/chrome_security_exploit_browsertest.cc[diff]
• content/browser/blob_storage/blob_url_unittest.cc[diff]
• content/browser/security_exploit_browsertest.cc[diff]
• storage/browser/blob/blob_registry_impl.cc[diff]
• storage/browser/blob/blob_url_store_impl.cc[diff]
• storage/browser/blob/blob_url_store_impl.h[diff]
• storage/browser/blob/blob_url_store_impl_unittest.cc[diff]