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Use [RaisesException] for immediate promise rejections in /third_party/blink/renderer/modules/serial.

The bindings layer implicitly converts thrown exceptions in promise-returning
functions to promise rejections, and using ExceptionState makes this more
similar to ordinarily throwing exceptions, notably by including the auto-
generated exception context that makes it easier to see what IDL operation
caused an exception to be thrown.

This CL was uploaded by git cl split.

R=reillyg@chromium.org

Bug: 1001114
Change-Id: I705359178d1e7c429d48f24f37ca11c28f750d2c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1786934Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Jeremy Roman <jbroman@chromium.org>
Auto-Submit: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#694276}