Remove VideoTrackWriter IDL.

This removes the VideoTrackWriter interface so that it will not become
visible when the WebCodecs feature is enabled.

The VideoTrackReader unittest depends on the VideoTrackWriter C++ code,
so that has been left for now.

Bug: 897297
Change-Id: I1c328d7ca995cf9019ca50c65f8cb7257fbb06ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2353538
Commit-Queue: Dan Sanders <sandersd@chromium.org>
Commit-Queue: Jeremy Roman <jbroman@chromium.org>
Auto-Submit: Dan Sanders <sandersd@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797945}

third_party/blink/renderer/bindings/idl_in_modules.gni

@@ -756,7 +756,6 @@ static_idl_files_in_modules = get_path_info(
           "//third_party/blink/renderer/modules/webcodecs/video_frame_init.idl",
           "//third_party/blink/renderer/modules/webcodecs/video_frame_output_callback.idl",
           "//third_party/blink/renderer/modules/webcodecs/video_track_reader.idl",
-          "//third_party/blink/renderer/modules/webcodecs/video_track_writer.idl",
           "//third_party/blink/renderer/modules/webcodecs/video_track_writer_parameters.idl",
           "//third_party/blink/renderer/modules/webcodecs/web_codecs_error_callback.idl",
           "//third_party/blink/renderer/modules/webdatabase/database.idl",

third_party/blink/renderer/modules/webcodecs/idls.gni

@@ -13,7 +13,6 @@ modules_idl_files = [
   "video_encoder.idl",
   "video_frame.idl",
   "video_track_reader.idl",
-  "video_track_writer.idl",
 ]
 
 modules_callback_function_idl_files = [

third_party/blink/renderer/modules/webcodecs/video_track_writer.cc

@@ -187,7 +187,6 @@ MediaStreamTrack* VideoTrackWriter::track() {
 void VideoTrackWriter::Trace(Visitor* visitor) const {
   visitor->Trace(track_);
   visitor->Trace(writable_);
-  ScriptWrappable::Trace(visitor);
 }
 
 }  // namespace blink

third_party/blink/renderer/modules/webcodecs/video_track_writer.h

@@ -7,7 +7,7 @@
 
 #include "third_party/blink/renderer/modules/mediastream/media_stream_track.h"
 #include "third_party/blink/renderer/modules/modules_export.h"
-#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
+#include "third_party/blink/renderer/platform/heap/heap.h"
 
 namespace blink {
 
@@ -15,11 +15,9 @@ class ScriptState;
 class WritableStream;
 class VideoTrackWriterParameters;
 
-class MODULES_EXPORT VideoTrackWriter final : public ScriptWrappable {
-  DEFINE_WRAPPERTYPEINFO();
-
+class MODULES_EXPORT VideoTrackWriter final
+    : public GarbageCollected<VideoTrackWriter> {
  public:
-  // video_track_writer.idl implementation
   static VideoTrackWriter* Create(ScriptState* script_state,
                                   const VideoTrackWriterParameters* params,
                                   ExceptionState& exception_state);
@@ -28,7 +26,7 @@ class MODULES_EXPORT VideoTrackWriter final : public ScriptWrappable {
   WritableStream* writable();
 
   // GarbageCollected override
-  void Trace(Visitor* visitor) const override;
+  virtual void Trace(Visitor* visitor) const;
 
  private:
   Member<MediaStreamTrack> track_;

third_party/blink/renderer/modules/webcodecs/video_track_writer.idl

-// Copyright 2020 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// See spec in developement at https://github.com/WICG/web-codecs/blob/master/index.bs
-// and https://github.com/WICG/web-codecs/blob/master/explainer.md.
-[
-    Exposed=Window,
-    RuntimeEnabled=WebCodecs
-] interface VideoTrackWriter {
-  [CallWith=ScriptState, RaisesException]
-  constructor(VideoTrackWriterParameters params);
-  readonly attribute WritableStream writable; // of VideoFrame
-  readonly attribute MediaStreamTrack track;
-};

third_party/blink/web_tests/webexposed/global-interface-listing-expected.txt

@@ -8842,11 +8842,6 @@ interface VideoTrackReader
     method constructor
     method start
     method stop
-interface VideoTrackWriter
-    attribute @@toStringTag
-    getter track
-    getter writable
-    method constructor
 interface VirtualKeyboard : EventTarget
     attribute @@toStringTag
     getter boundingRect