Add more missing closing namespace comments.

third_party/WebKit/Source/platform/audio/AudioUtilities.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 32 matching lines @@
 
 // Convert the time to a sample frame at the given sample rate.
 PLATFORM_EXPORT size_t timeToSampleFrame(double time, double sampleRate);
 
 // Check that |sampleRate| is a valid rate for AudioBuffers.
 PLATFORM_EXPORT bool isValidAudioBufferSampleRate(float sampleRate);
 
 // Return max/min sample rate supported by AudioBuffers.
 PLATFORM_EXPORT float minAudioBufferSampleRate();
 PLATFORM_EXPORT float maxAudioBufferSampleRate();
-} // AudioUtilites
+} // namespace AudioUtilities
 } // namespace blink
 
 #endif // AudioUtilities_h