Revert of Implement suspend() and resume() for OfflineAudioContext

Source/modules/webaudio/OfflineAudioDestinationNode.h

 /*
  * Copyright (C) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
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  *    notice, this list of conditions and the following disclaimer.
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  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
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  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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 #ifndef OfflineAudioDestinationNode_h
 #define OfflineAudioDestinationNode_h
 
 #include "modules/webaudio/AudioBuffer.h"
 #include "modules/webaudio/AudioDestinationNode.h"
-#include "modules/webaudio/OfflineAudioContext.h"
 #include "public/platform/WebThread.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class AbstractAudioContext;
 class AudioBus;
-class OfflineAudioContext;
 
 class OfflineAudioDestinationHandler final : public AudioDestinationHandler {
 public:
     static PassRefPtr<OfflineAudioDestinationHandler> create(AudioNode&, AudioBuffer* renderTarget);
     ~OfflineAudioDestinationHandler() override;
 
     // AudioHandler
     void dispose() override;
     void initialize() override;
     void uninitialize() override;
 
-    OfflineAudioContext* context() const final;
-
-    // Override the one from AudioContext. Create a rendering thread and
-    // initiate rendering loop or resume rendering if already started and
-    // suspended.
+    // AudioDestinationHandler
     void startRendering() override;
-
-    // There is no support of the explicit stopping in OfflineAudioContext. This
-    // is just to match the class method signature.
     void stopRendering() override;
 
-    float sampleRate() const override { return m_renderTarget->sampleRate(); }
-
-    // Return the frame position by quantizing the time (in seconds) and
-    // rounding it down to the nearest render quantum boundary.
-    size_t quantizeTimeToRenderQuantum(double when) const;
-
-    WebThread* offlineRenderThread();
+    float sampleRate()  const override { return m_renderTarget->sampleRate(); }
 
 private:
     OfflineAudioDestinationHandler(AudioNode&, AudioBuffer* renderTarget);
-
-    // For start/suspend/resume rendering in the destination node.
-    void startOfflineRendering();
-    void runOfflineRendering();
-    void finishOfflineRendering();
+    void offlineRender();
+    void offlineRenderInternal();
 
     // For completion callback on main thread.
     void notifyComplete();
 
     // This AudioHandler renders into this AudioBuffer.
     // This Persistent doesn't make a reference cycle including the owner
     // OfflineAudioDestinationNode.
     Persistent<AudioBuffer> m_renderTarget;
     // Temporary AudioBus for each render quantum.
     RefPtr<AudioBus> m_renderBus;
 
     // Rendering thread.
     OwnPtr<WebThread> m_renderThread;
-
-    size_t m_framesProcessed;
-    size_t m_framesToProcess;
-
-    bool m_isRenderingStarted;
+    bool m_startedRendering;
 };
 
 class OfflineAudioDestinationNode final : public AudioDestinationNode {
 public:
     static OfflineAudioDestinationNode* create(AbstractAudioContext*, AudioBuffer* renderTarget);
 
 private:
     OfflineAudioDestinationNode(AbstractAudioContext&, AudioBuffer* renderTarget);
 };
 
 } // namespace blink
 
 #endif // OfflineAudioDestinationNode_h