Use HTML's Transfer abstract operation directly

This allows us to eliminate the somewhat-silly SameRealmTransfer.

index.bs

@@ -30,7 +30,7 @@ Ignored Vars: e
 <pre class="anchors">
 urlPrefix: https://html.spec.whatwg.org/multipage/; spec: HTML
     text: StructuredClone; urlPrefix: infrastructure.html; type: abstract-op
-    text: StructuredCloneWithTransfer; urlPrefix: infrastructure.html; type: abstract-op
+    text: Transfer; url: infrastructure.html#transfer-abstract-op; type: abstract-op
     text: WebSocket; url: comms.html#websocket; type: interface
     text: transferable objects; url: infrastructure.html; type: dfn
 urlPrefix: https://tc39.github.io/ecma262/; spec: ECMASCRIPT
@@ -2124,7 +2124,7 @@ nothrow>ReadableByteStreamControllerEnqueue ( <var>controller</var>, <var>chunk<
   1. Let _buffer_ be _chunk_.[[ViewedArrayBuffer]].
   1. Let _byteOffset_ be _chunk_.[[ByteOffset]].
   1. Let _byteLength_ be _chunk_.[[ByteLength]].
-  1. Let _transferredBuffer_ be ! SameRealmTransfer(_buffer_).
+  1. Let _transferredBuffer_ be ! <a abstract-op>Transfer</a>(_buffer_, the current Realm Record).
   1. If ! ReadableStreamHasDefaultReader(_stream_) is *true*
     1. If ! ReadableStreamGetNumReadRequests(_stream_) is *0*,
       1. Perform ! ReadableByteStreamControllerEnqueueChunkToQueue(_controller_, _transferredBuffer_, _byteOffset_,
@@ -2279,7 +2279,8 @@ nothrow>ReadableByteStreamControllerPullInto ( <var>controller</var>, <var>view<
      _view_.[[ByteOffset]], [[byteLength]]: _view_.[[ByteLength]], [[bytesFilled]]: *0*, [[elementSize]]: _elementSize_,
      [[ctor]]: _ctor_, [[readerType]]: `"byob"`}.
   1. If _controller_.[[pendingPullIntos]] is not empty,
-    1. Set _pullIntoDescriptor_.[[buffer]] to ! SameRealmTransfer(_pullIntoDescriptor_.[[buffer]]).
+    1. Set _pullIntoDescriptor_.[[buffer]] to ! <a abstract-op>Transfer</a>(_pullIntoDescriptor_.[[buffer]], the current
+       Realm Record).
     1. Append _pullIntoDescriptor_ as the last element of _controller_.[[pendingPullIntos]].
     1. Return ! ReadableStreamAddReadIntoRequest(_stream_).
   1. If _stream_.[[state]] is `"closed"`,
@@ -2294,7 +2295,8 @@ nothrow>ReadableByteStreamControllerPullInto ( <var>controller</var>, <var>view<
       1. Let _e_ be a *TypeError* exception.
       1. Perform ! ReadableByteStreamControllerError(_controller_, _e_).
       1. Return a promise rejected with _e_.
-  1. Set _pullIntoDescriptor_.[[buffer]] to ! SameRealmTransfer(_pullIntoDescriptor_.[[buffer]]).
+  1. Set _pullIntoDescriptor_.[[buffer]] to ! <a abstract-op>Transfer</a>(_pullIntoDescriptor_.[[buffer]], the current
+     Realm Record).
   1. Append _pullIntoDescriptor_ as the last element of _controller_.[[pendingPullIntos]].
   1. Let _promise_ be ! ReadableStreamAddReadIntoRequest(_stream_).
   1. Perform ! ReadableByteStreamControllerCallPullIfNeeded(_controller_).
@@ -2316,7 +2318,8 @@ throws>ReadableByteStreamControllerRespond ( <var>controller</var>, <var>bytesWr
 nothrow>ReadableByteStreamControllerRespondInClosedState ( <var>controller</var>, <var>firstDescriptor</var> )</h4>
 
 <emu-alg>
-  1. Set _firstDescriptor_.[[buffer]] to ! SameRealmTransfer(_firstDescriptor_.[[buffer]]).
+  1. Set _firstDescriptor_.[[buffer]] to ! <a abstract-op>Transfer</a>(_firstDescriptor_.[[buffer]], the current Realm
+     Record).
   1. Assert: _firstDescriptor_.[[bytesFilled]] is *0*.
   1. Let _stream_ be _controller_.[[controlledReadableStream]].
   1. Repeat the following steps while ! ReadableStreamGetNumReadIntoRequests(_stream_) > *0*,
@@ -2342,7 +2345,8 @@ aoid="ReadableByteStreamControllerRespondInReadableState" throws>ReadableByteStr
        %ArrayBuffer%).
     1. Perform ! ReadableByteStreamControllerEnqueueChunkToQueue(_controller_, _remainder_, *0*,
        _remainder_.[[ByteLength]]).
-  1. Set _pullIntoDescriptor_.[[buffer]] to ! SameRealmTransfer(_pullIntoDescriptor_.[[buffer]]).
+  1. Set _pullIntoDescriptor_.[[buffer]] to ! <a abstract-op>Transfer</a>(_pullIntoDescriptor_.[[buffer]], the current
+     Realm Record).
   1. Set _pullIntoDescriptor_.[[bytesFilled]] to _pullIntoDescriptor_.[[bytesFilled]] − _remainderSize_.
   1. Perform ! ReadableByteStreamControllerCommitPullIntoDescriptor(_controller_.[[controlledReadableStream]],
      _pullIntoDescriptor_).
@@ -3581,19 +3585,6 @@ A few abstract operations are used in this specification for utility purposes. W
   1. Otherwise, return a new promise resolved with _returnValue_.[[Value]].
 </emu-alg>
 
-<h4 id="same-realm-transfer" aoid="SameRealmTransfer" nothrow>SameRealmTransfer( <var>O</var> )</h4>
-
-<div class="note">
-  SameRealmTransfer takes as its argument a <a>transferable object</a> and returns a new object, created in the same
-  realm, with the same underlying data. The original object becomes detached.
-</div>
-
-<emu-alg>
-  1. Let _transferResult_ be ! <a abstract-op>StructuredCloneWithTransfer</a>(*undefined*, « _O_ », the current Realm
-     Record).
-  1. Return the first (and only) element of _transferResult_.[[TransferList]].
-</emu-alg>
-
 <h4 id="validate-and-normalize-high-water-mark" aoid="ValidateAndNormalizeHighWaterMark"
 throws>ValidateAndNormalizeHighWaterMark ( <var>highWaterMark</var> )</h4>