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

public/platform/WebAudioDevice.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
@@ skipping 26 matching lines @@
 
 class WebAudioDevice {
 public:
     class RenderCallback {
     public:
         virtual void render(const WebVector<float*>& sourceData, const WebVector<float*>& destinationData, size_t numberOfFrames) { };
 
     protected:
         virtual ~RenderCallback() { }
     };
-  
+
     virtual ~WebAudioDevice() { }
 
     virtual void start() = 0;
     virtual void stop() = 0;
     virtual double sampleRate() = 0;
 };
 
 } // namespace WebKit
 
 #endif // WebAudioDevice_h