[WebNN] Add "webnn" permissions policy feature#60418
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Implement the "webnn" policy-controlled feature as specified in the WebNN specification [1]. The default allowlist is 'self', which means the WebNN API is available to top-level documents and same-origin iframes by default, but blocked in cross-origin iframes unless explicitly granted via the Permissions-Policy header or iframe allow attribute. When the feature is disabled, navigator.ml.createContext() rejects with a "SecurityError" DOMException per the spec. This CL also changes the WebIDL to only expose the WebNN interfaces to DedicatedWorker and updates related WPTs. [1] https://www.w3.org/TR/webnn/#permissions-policy-integration Bug: 502083483 Change-Id: I5c723e0ea03864fd0b122aed8b3d31f602545a2e Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7885337 Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org> Reviewed-by: Bo Liu <boliu@chromium.org> Reviewed-by: Reilly Grant <reillyg@chromium.org> Reviewed-by: Kent Tamura <tkent@chromium.org> Reviewed-by: Steven Holte <holte@chromium.org> Commit-Queue: Wang, Wei4 <wei4.wang@intel.com> Cr-Commit-Position: refs/heads/main@{#1642237}
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Implement the "webnn" policy-controlled feature as specified in the
WebNN specification [1]. The default allowlist is 'self', which means
the WebNN API is available to top-level documents and same-origin
iframes by default, but blocked in cross-origin iframes unless
explicitly granted via the Permissions-Policy header or iframe allow
attribute.
When the feature is disabled, navigator.ml.createContext() rejects
with a "SecurityError" DOMException per the spec.
This CL also changes the WebIDL to only expose the WebNN interfaces
to DedicatedWorker and updates related WPTs.
[1] https://www.w3.org/TR/webnn/#permissions-policy-integration
Bug: 502083483
Change-Id: I5c723e0ea03864fd0b122aed8b3d31f602545a2e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7885337
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Reviewed-by: Bo Liu <boliu@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Wang, Wei4 <wei4.wang@intel.com>
Cr-Commit-Position: refs/heads/main@{#1642237}