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

Source/modules/webaudio/AsyncAudioDecoder.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 38 matching lines @@
     // Must be called on the main thread.
     void decodeAsync(ArrayBuffer* audioData, float sampleRate, PassRefPtr<AudioBufferCallback> successCallback, PassRefPtr<AudioBufferCallback> errorCallback);
 
 private:
     class DecodingTask {
         WTF_MAKE_NONCOPYABLE(DecodingTask);
     public:
         static PassOwnPtr<DecodingTask> create(ArrayBuffer* audioData, float sampleRate, PassRefPtr<AudioBufferCallback> successCallback, PassRefPtr<AudioBufferCallback> errorCallback);
 
         void decode();
-        
+
     private:
         DecodingTask(ArrayBuffer* audioData, float sampleRate, PassRefPtr<AudioBufferCallback> successCallback, PassRefPtr<AudioBufferCallback> errorCallback);
 
         ArrayBuffer* audioData() { return m_audioData.get(); }
         float sampleRate() const { return m_sampleRate; }
         AudioBufferCallback* successCallback() { return m_successCallback.get(); }
         AudioBufferCallback* errorCallback() { return m_errorCallback.get(); }
         AudioBuffer* audioBuffer() { return m_audioBuffer.get(); }
 
         static void notifyCompleteDispatch(void* userData);
         void notifyComplete();
 
         RefPtr<ArrayBuffer> m_audioData;
         float m_sampleRate;
         RefPtr<AudioBufferCallback> m_successCallback;
         RefPtr<AudioBufferCallback> m_errorCallback;
         RefPtr<AudioBuffer> m_audioBuffer;
     };
-    
+
     static void threadEntry(void* threadData);
     void runLoop();
 
     WTF::ThreadIdentifier m_threadID;
     Mutex m_threadCreationMutex;
     MessageQueue<DecodingTask> m_queue;
 };
 
 } // namespace WebCore
 
 #endif // AsyncAudioDecoder_h