Fix virtual/override/final usage in Source/modules/.

Source/modules/webaudio/AudioBufferSourceNode.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 27 matching lines @@
 namespace blink {
 
 class AudioContext;
 
 // AudioBufferSourceNode is an AudioNode representing an audio source from an in-memory audio asset represented by an AudioBuffer.
 // It generally will be used for short sounds which require a high degree of scheduling flexibility (can playback in rhythmically perfect ways).
 
 class AudioBufferSourceHandler final : public AudioScheduledSourceHandler {
 public:
     static PassRefPtr<AudioBufferSourceHandler> create(AudioNode&, float sampleRate, AudioParamHandler& playbackRate, AudioParamHandler& detune);
-    virtual ~AudioBufferSourceHandler();
+    ~AudioBufferSourceHandler() override;
 
     // AudioHandler
-    virtual void process(size_t framesToProcess) override;
+    void process(size_t framesToProcess) override;
 
     // setBuffer() is called on the main thread. This is the buffer we use for playback.
     void setBuffer(AudioBuffer*, ExceptionState&);
     AudioBuffer* buffer() { return m_buffer.get(); }
 
     // numberOfChannels() returns the number of output channels.  This value equals the number of channels from the buffer.
     // If a new buffer is set with a different number of channels, then this value will dynamically change.
     unsigned numberOfChannels();
 
     // Play-state
@@ skipping 11 matching lines @@
     double loopStart() const { return m_loopStart; }
     double loopEnd() const { return m_loopEnd; }
     void setLoopStart(double loopStart) { m_loopStart = loopStart; }
     void setLoopEnd(double loopEnd) { m_loopEnd = loopEnd; }
 
     // If a panner node is set, then we can incorporate doppler shift into the playback pitch rate.
     void setPannerNode(PannerHandler*);
     void clearPannerNode();
 
     // If we are no longer playing, propogate silence ahead to downstream nodes.
-    virtual bool propagatesSilence() const override;
+    bool propagatesSilence() const override;
 
     // AudioScheduledSourceNode
-    virtual void finish() override;
+    void finish() override;
 
     void handleStoppableSourceNode();
 
 private:
     AudioBufferSourceHandler(AudioNode&, float sampleRate, AudioParamHandler& playbackRate, AudioParamHandler& detune);
     void startSource(double when, double grainOffset, double grainDuration, bool isDurationGiven, ExceptionState&);
 
     // Returns true on success.
     bool renderFromBuffer(AudioBus*, unsigned destinationFrameOffset, size_t numberOfFrames);
 
@@ skipping 82 matching lines @@
 private:
     AudioBufferSourceNode(AudioContext&, float sampleRate);
 
     Member<AudioParam> m_playbackRate;
     Member<AudioParam> m_detune;
 };
 
 } // namespace blink
 
 #endif // AudioBufferSourceNode_h