Improve spelling of "notification".

media/audio/cras/cras_unified.h

 // Copyright 2013 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.
 //
 // Creates a unified stream based on the cras (ChromeOS audio server) interface.
 //
 // CrasUnifiedStream object is *not* thread-safe and should only be used
 // from the audio thread.
 
 #ifndef MEDIA_AUDIO_LINUX_CRAS_UNIFIED_H_
@@ skipping 36 matching lines @@
   // Handles captured audio and fills the ouput with audio to be played.
   static int UnifiedCallback(cras_client* client,
                              cras_stream_id_t stream_id,
                              uint8* input_samples,
                              uint8* output_samples,
                              unsigned int frames,
                              const timespec* input_ts,
                              const timespec* output_ts,
                              void* arg);
 
-  // Handles notificaiton that there was an error with the playback stream.
+  // Handles notification that there was an error with the playback stream.
   static int StreamError(cras_client* client,
                          cras_stream_id_t stream_id,
                          int err,
                          void* arg);
 
   // Chooses the correct audio callback based on stream direction.
   uint32 DispatchCallback(size_t frames,
                           uint8* input_samples,
                           uint8* output_samples,
                           const timespec* input_ts,
@@ skipping 42 matching lines @@
 
   // Direciton of the stream.
   CRAS_STREAM_DIRECTION stream_direction_;
 
   DISALLOW_COPY_AND_ASSIGN(CrasUnifiedStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_LINUX_CRAS_UNIFIED_H_