Revert "Remove NotEnumerable from Transform Streams WebIDL"

This reverts commit b52b97cb.

Reason for revert: It is breaking external/wpt/streams/idlharness.any.html based on bisection.

Original change's description:
> Remove NotEnumerable from Transform Streams WebIDL
>
> According to https://github.com/whatwg/streams/pull/1035, all methods
> and accessors are now enumerable, per Web IDL defaults, instead of
> non-enumerable, per ECMAScript defaults. Hence, 'NotEnumerable' can
> be removed from the Streams WebIDL files. This CL specifically
> removes them from transform streams.
>
> Bug: 1093862
> Change-Id: I509b470722039ebad20b8caeaa7f34189c24b1ba
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2486006
> Commit-Queue: Nidhi Jaju <nidhijaju@google.com>
> Reviewed-by: Adam Rice <ricea@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#819230}

TBR=ricea@chromium.org,nidhijaju@google.com

Change-Id: I7176391031e4bbf89960fe6d7f358a520d06dd21
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1093862
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2487745Reviewed-by: Fergal Daly <fergal@chromium.org>
Commit-Queue: Fergal Daly <fergal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819275}

third_party/blink/renderer/core/streams/transform_stream.idl

@@ -9,6 +9,6 @@
     [CallWith=ScriptState, RaisesException] constructor(optional any transformer,
                 optional any writableStrategy,
                 optional any readableStrategy);
-    readonly attribute ReadableStream readable;
-    readonly attribute WritableStream writable;
+    [NotEnumerable] readonly attribute ReadableStream readable;
+    [NotEnumerable] readonly attribute WritableStream writable;
 };

third_party/blink/renderer/core/streams/transform_stream_default_controller.idl

@@ -6,9 +6,9 @@
 
 // https://streams.spec.whatwg.org/#rs-default-controller-class-definition
 interface TransformStreamDefaultController {
-    readonly attribute double? desiredSize;
-    [CallWith=ScriptState, RaisesException] void enqueue(
+    [NotEnumerable] readonly attribute double? desiredSize;
+    [CallWith=ScriptState, NotEnumerable, RaisesException] void enqueue(
         optional any chunk);
-    [CallWith=ScriptState] void error(optional any reason);
-    [CallWith=ScriptState] void terminate();
+    [CallWith=ScriptState, NotEnumerable] void error(optional any reason);
+    [CallWith=ScriptState, NotEnumerable] void terminate();
 };

third_party/blink/web_tests/external/wpt/streams/idlharness.any-expected.txt

 This is a testharness.js-based test.
-Found 224 tests; 138 PASS, 86 FAIL, 0 TIMEOUT, 0 NOTRUN.
+Found 224 tests; 126 PASS, 98 FAIL, 0 TIMEOUT, 0 NOTRUN.
 PASS idl_test setup
 PASS idl_test validation
 PASS ReadableStreamDefaultReader includes ReadableStreamGenericReader: member names are unique
@@ -176,8 +176,8 @@ PASS TransformStream interface object name
 PASS TransformStream interface: existence and properties of interface prototype object
 PASS TransformStream interface: existence and properties of interface prototype object's "constructor" property
 PASS TransformStream interface: existence and properties of interface prototype object's @@unscopables property
-PASS TransformStream interface: attribute readable
-PASS TransformStream interface: attribute writable
+FAIL TransformStream interface: attribute readable assert_true: property should be enumerable expected true got false
+FAIL TransformStream interface: attribute writable assert_true: property should be enumerable expected true got false
 PASS TransformStream must be primary interface of new TransformStream()
 PASS Stringification of new TransformStream()
 PASS TransformStream interface: new TransformStream() must inherit property "readable" with the proper type

third_party/blink/web_tests/external/wpt/streams/idlharness.any.serviceworker-expected.txt

 This is a testharness.js-based test.
-Found 224 tests; 138 PASS, 86 FAIL, 0 TIMEOUT, 0 NOTRUN.
+Found 224 tests; 126 PASS, 98 FAIL, 0 TIMEOUT, 0 NOTRUN.
 PASS idl_test setup
 PASS idl_test validation
 PASS ReadableStreamDefaultReader includes ReadableStreamGenericReader: member names are unique
@@ -176,8 +176,8 @@ PASS TransformStream interface object name
 PASS TransformStream interface: existence and properties of interface prototype object
 PASS TransformStream interface: existence and properties of interface prototype object's "constructor" property
 PASS TransformStream interface: existence and properties of interface prototype object's @@unscopables property
-PASS TransformStream interface: attribute readable
-PASS TransformStream interface: attribute writable
+FAIL TransformStream interface: attribute readable assert_true: property should be enumerable expected true got false
+FAIL TransformStream interface: attribute writable assert_true: property should be enumerable expected true got false
 PASS TransformStream must be primary interface of new TransformStream()
 PASS Stringification of new TransformStream()
 PASS TransformStream interface: new TransformStream() must inherit property "readable" with the proper type

third_party/blink/web_tests/external/wpt/streams/idlharness.any.sharedworker-expected.txt

 This is a testharness.js-based test.
-Found 224 tests; 138 PASS, 86 FAIL, 0 TIMEOUT, 0 NOTRUN.
+Found 224 tests; 126 PASS, 98 FAIL, 0 TIMEOUT, 0 NOTRUN.
 PASS idl_test setup
 PASS idl_test validation
 PASS ReadableStreamDefaultReader includes ReadableStreamGenericReader: member names are unique
@@ -176,8 +176,8 @@ PASS TransformStream interface object name
 PASS TransformStream interface: existence and properties of interface prototype object
 PASS TransformStream interface: existence and properties of interface prototype object's "constructor" property
 PASS TransformStream interface: existence and properties of interface prototype object's @@unscopables property
-PASS TransformStream interface: attribute readable
-PASS TransformStream interface: attribute writable
+FAIL TransformStream interface: attribute readable assert_true: property should be enumerable expected true got false
+FAIL TransformStream interface: attribute writable assert_true: property should be enumerable expected true got false
 PASS TransformStream must be primary interface of new TransformStream()
 PASS Stringification of new TransformStream()
 PASS TransformStream interface: new TransformStream() must inherit property "readable" with the proper type

third_party/blink/web_tests/external/wpt/streams/idlharness.any.worker-expected.txt

 This is a testharness.js-based test.
-Found 224 tests; 138 PASS, 86 FAIL, 0 TIMEOUT, 0 NOTRUN.
+Found 224 tests; 126 PASS, 98 FAIL, 0 TIMEOUT, 0 NOTRUN.
 PASS idl_test setup
 PASS idl_test validation
 PASS ReadableStreamDefaultReader includes ReadableStreamGenericReader: member names are unique
@@ -176,8 +176,8 @@ PASS TransformStream interface object name
 PASS TransformStream interface: existence and properties of interface prototype object
 PASS TransformStream interface: existence and properties of interface prototype object's "constructor" property
 PASS TransformStream interface: existence and properties of interface prototype object's @@unscopables property
-PASS TransformStream interface: attribute readable
-PASS TransformStream interface: attribute writable
+FAIL TransformStream interface: attribute readable assert_true: property should be enumerable expected true got false
+FAIL TransformStream interface: attribute writable assert_true: property should be enumerable expected true got false
 PASS TransformStream must be primary interface of new TransformStream()
 PASS Stringification of new TransformStream()
 PASS TransformStream interface: new TransformStream() must inherit property "readable" with the proper type