Remove {,un}setPendingActivity from AudioContext.

Source/modules/webaudio/AudioContext.h

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 72 matching lines @@
     static PassRefPtr<AudioContext> create(Document&, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState&);
 
     virtual ~AudioContext();
 
     bool isInitialized() const;
 
     bool isOfflineContext() { return m_isOfflineContext; }
 
     // Document notification
     virtual void stop() OVERRIDE FINAL;
+    virtual bool hasPendingActivity() const OVERRIDE;
 
     AudioDestinationNode* destination() { return m_destinationNode.get(); }
     size_t currentSampleFrame() const { return m_destinationNode->currentSampleFrame(); }
     double currentTime() const { return m_destinationNode->currentTime(); }
     float sampleRate() const { return m_destinationNode->sampleRate(); }
     unsigned long activeSourceCount() const { return static_cast<unsigned long>(m_activeSourceCount); }
 
     void incrementActiveSourceCount();
     void decrementActiveSourceCount();
 
@@ skipping 141 matching lines @@
 private:
     void constructCommon();
 
     void lazyInitialize();
     void uninitialize();
 
     // ExecutionContext calls stop twice.
     // We'd like to schedule only one stop action for them.
     bool m_isStopScheduled;
     static void stopDispatch(void* userData);
+    bool m_isCleared;
     void clear();
 
     void scheduleNodeDeletion();
     static void deleteMarkedNodesDispatch(void* userData);
 
     bool m_isInitialized;
     bool m_isAudioThreadFinished;
 
     // The context itself keeps a reference to all source nodes.  The source nodes, then reference all nodes they're connected to.
     // In turn, these nodes reference all nodes they're connected to.  All nodes are ultimately connected to the AudioDestinationNode.
@@ skipping 61 matching lines @@
     // It is somewhat arbitrary and could be increased if necessary.
     enum { MaxNumberOfChannels = 32 };
 
     // Number of AudioBufferSourceNodes that are active (playing).
     int m_activeSourceCount;
 };
 
 } // WebCore
 
 #endif // AudioContext_h