AI: Use SecureContext for ai APIs
This change updates experimental window.ai APIs to use
SecureContext.
Bug: 372311600
Change-Id: I9e5cc54afb2ed84f506f03c658a92d9d0c2cbd45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6020818
Reviewed-by: Tsuyoshi Horo horo@chromium.org
Commit-Queue: Ayu Ishii ayui@chromium.org
Cr-Commit-Position: refs/heads/main@{#1383893}