[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.cpp

 // Copyright 2015 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.
 
 #include "modules/mediarecorder/MediaRecorder.h"
 
 #include "bindings/core/v8/Dictionary.h"
 #include "core/events/Event.h"
 #include "core/fileapi/Blob.h"
 #include "core/inspector/ConsoleMessage.h"
@@ skipping 114 matching lines @@
 
 MediaRecorder* MediaRecorder::create(ExecutionContext* context, MediaStream* stream,  const MediaRecorderOptions& options, ExceptionState& exceptionState)
 {
     MediaRecorder* recorder = new MediaRecorder(context, stream, options, exceptionState);
     recorder->suspendIfNeeded();
 
     return recorder;
 }
 
 MediaRecorder::MediaRecorder(ExecutionContext* context, MediaStream* stream, const MediaRecorderOptions& options, ExceptionState& exceptionState)
-    : ActiveDOMObject(context)
+    : ActiveScriptWrappable(this)
+    , ActiveDOMObject(context)
     , m_stream(stream)
     , m_streamAmountOfTracks(stream->getTracks().size())
     , m_mimeType(options.mimeType())
     , m_stopped(true)
     , m_ignoreMutedMedia(true)
     , m_audioBitsPerSecond(0)
     , m_videoBitsPerSecond(0)
     , m_state(State::Inactive)
     , m_dispatchScheduledEventRunner(AsyncMethodRunner<MediaRecorder>::create(this, &MediaRecorder::dispatchScheduledEvent))
 {
@@ skipping 205 matching lines @@
 DEFINE_TRACE(MediaRecorder)
 {
     visitor->trace(m_stream);
     visitor->trace(m_dispatchScheduledEventRunner);
     visitor->trace(m_scheduledEvents);
     RefCountedGarbageCollectedEventTargetWithInlineData<MediaRecorder>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink