CORS check for prefetched subresource signed exchanges

Bug: 935267
Change-Id: I453bec48331cdbc203f96ccd3c99168f2f1734d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1616937
Commit-Queue: Tsuyoshi Horo <horo@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662114}
5 files changed