Fix wrong header guards found by clang's new Wheader-guard.

media/audio/fake_audio_input_stream.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // A fake implementation of AudioInputStream, useful for testing purpose.
 
 #ifndef MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
-#define MEDIA_AUDIO_FAKE_AUDIO_INOUT_STREAM_H_
+#define MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread.h"
 #include "base/time.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
 
@@ skipping 48 matching lines @@
   int beep_generated_in_buffers_;
   int beep_period_in_frames_;
   int frames_elapsed_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeAudioInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_