Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/modules/webaudio/DefaultAudioDestinationNode.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
  * 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 20 matching lines @@
 
 namespace WebCore {
 
 class AudioContext;
 class ExceptionState;
 
 class DefaultAudioDestinationNode : public AudioDestinationNode {
 public:
     static PassRefPtr<DefaultAudioDestinationNode> create(AudioContext* context)
     {
-        return adoptRef(new DefaultAudioDestinationNode(context));     
+        return adoptRef(new DefaultAudioDestinationNode(context));
     }
 
     virtual ~DefaultAudioDestinationNode();
-    
-    // AudioNode   
+
+    // AudioNode
     virtual void initialize() OVERRIDE;
     virtual void uninitialize() OVERRIDE;
     virtual void setChannelCount(unsigned long, ExceptionState&) OVERRIDE;
 
     // AudioDestinationNode
     virtual void enableInput(const String& inputDeviceId) OVERRIDE;
     virtual void startRendering() OVERRIDE;
     virtual unsigned long maxChannelCount() const OVERRIDE;
-    
+
 private:
     explicit DefaultAudioDestinationNode(AudioContext*);
     void createDestination();
 
     OwnPtr<AudioDestination> m_destination;
     String m_inputDeviceId;
     unsigned m_numberOfInputChannels;
 };
 
 } // namespace WebCore
 
 #endif // DefaultAudioDestinationNode_h