bluetooth: Use [PassAsSpan] to handle BufferSource arguments
This change simplifies the implementation of Web Bluetooth methods which
accept a BufferSource argument by using the [PassAsSpan] WebIDL
attribute.
Using this requires a behavior change: Passing a detached buffer is now
no longer fatal (except when it causes other argument validation errors)
because a detached buffer turns into an empty span. I think this is a
safe change to make because it matches the WebIDL rules for handling
detached buffers (throwing a specific error was unspecified behavior)
and this case is developer error, so sites shouldn't be depending on it.
Change-Id: I1e47d8e3a219f65bd69f78018a434ab6f8a3cd62
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5952456
Auto-Submit: Reilly Grant reillyg@chromium.org
Commit-Queue: Reilly Grant reillyg@chromium.org
Reviewed-by: Matt Reynolds mattreynolds@chromium.org
Cr-Commit-Position: refs/heads/main@{#1372813}