Bug 1715840 [wpt PR 29331] - Expose WritableStreamDefaultController, a=testonly

Automatic update from web-platform-tests
Expose WritableStreamDefaultController

WritableStreamDefaultController was not exposed on the global object.
This is not compliant with the current version of the standard.

Expose it.

Skipping the Blink intents process as this is a trivial change to
expose an unusable constructor for spec alignment. Sent PSA:

https://groups.google.com/a/chromium.org/g/blink-dev/c/wSXMiDJEsMo/m/jpqH7JjZAgAJ

BUG=626703,1217982

Change-Id: I459c65cd369cdf9266d012a16750bbd05612b5ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2951849
Commit-Queue: Adam Rice <ricea@chromium.org>
Reviewed-by: Yoav Weiss <yoavweiss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#899054}

--

wpt-commits: b09c109f7be1f479bfa17b8887f0286bf7653baa
wpt-pr: 29331

testing/web-platform/tests/workers/semantics/interface-objects/004.any.js

@@ -17,8 +17,6 @@ var unexpected = [
   "PopStateEvent",
   "HashChangeEvent",
   "PageTransitionEvent",
-  // https://streams.spec.whatwg.org/
-  "WritableStreamDefaultController",
   // http://w3c.github.io/IndexedDB/
   "IDBEnvironment",
   // https://www.w3.org/TR/2010/NOTE-webdatabase-20101118/