[DO NOT SUBMIT] AudioWorklet FS2a: AudioWorkletThread on OfflineAudioContext

third_party/WebKit/Source/modules/webaudio/AudioWorkletThread.h

+// Copyright 2016 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.
+
+#ifndef AudioWorkletThread_h
+#define AudioWorkletThread_h
+
+#include "core/dom/MessagePort.h"
+#include "platform/WebThreadSupportingGC.h"
+#include "platform/heap/Handle.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class SerializedScriptValue;
+class AudioDestinationHandler;
+class AudioWorkletGlobalScope;
+// class AudioWorkletMessagingProxy;
+class AudioWorkletThreadStartupData;
+
+class AudioWorkletThread : public RefCounted<AudioWorkletThread> {
+public:
+    static PassRefPtr<AudioWorkletThread> create(AudioDestinationHandler&);
+    virtual ~AudioWorkletThread();
+
+    bool isCurrentThread();
+    void initialize(LocalFrame*, PassOwnPtr<AudioWorkletThreadStartupData>);
+    void shutdown();
+    void evaluate(const String& sourceCode, const KURL& scriptURL);
+
+    WebThreadSupportingGC& audioRenderThread();
+    v8::Isolate* isolate() const { return m_isolate; }
+
+private:
+    explicit AudioWorkletThread(AudioDestinationHandler&);
+
+    void initializeInternal(LocalFrame*, PassOwnPtr<AudioWorkletThreadStartupData>);
+    void shutdownInternal();
+    void evaluateInternal(const String& sourceCode, const KURL& scriptURL);
+    void performShutdownTask();
+
+    OwnPtr<WebThread::TaskObserver> m_microtaskRunner;
+
+    bool m_shutdown;
+    bool m_initialized = false;
+    Mutex m_threadStateMutex;
+
+    Persistent<AudioWorkletGlobalScope> m_audioWorkletGlobalScope;
+    AudioDestinationHandler& m_destinationHandler;
+    v8::Isolate* m_isolate;
+};
+
+} // namespace blink
+
+#endif // AudioWorkletThread_h