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

Source/modules/webaudio/AudioScheduledSourceNode.h

 /*
  * Copyright (C) 2012 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
@@ skipping 35 matching lines @@
     //
     // The state can only transition to the next state, except for the FINISHED_STATE which can
     // never be changed.
     enum PlaybackState {
         // These must be defined with the same names and values as in the .idl file.
         UNSCHEDULED_STATE = 0,
         SCHEDULED_STATE = 1,
         PLAYING_STATE = 2,
         FINISHED_STATE = 3
     };
-    
+
     AudioScheduledSourceNode(AudioContext*, float sampleRate);
 
     // Scheduling.
     void start(double when);
     void stop(double when);
 
     void noteOn(double when);
     void noteOff(double when);
 
     unsigned short playbackState() const { return static_cast<unsigned short>(m_playbackState); }
@@ skipping 33 matching lines @@
     double m_endTime; // in seconds
 
     bool m_hasEndedListener;
 
     static const double UnknownTime;
 };
 
 } // namespace WebCore
 
 #endif // AudioScheduledSourceNode_h