Replace more ObserverList with base::ObserverList.

remoting/host/linux/audio_pipe_reader.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.
 
 #ifndef REMOTING_HOST_LINUX_AUDIO_PIPE_READER_H_
 #define REMOTING_HOST_LINUX_AUDIO_PIPE_READER_H_
 
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/files/file_path_watcher.h"
@@ skipping 62 matching lines @@
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   base::FilePath pipe_path_;
 
   // Watcher for the directory that contains audio pipe we are reading from, to
   // monitor when pulseaudio creates or deletes it.
   base::FilePathWatcher file_watcher_;
 
   base::File pipe_;
   base::RepeatingTimer<AudioPipeReader> timer_;
-  scoped_refptr<ObserverListThreadSafe<StreamObserver> > observers_;
+  scoped_refptr<base::ObserverListThreadSafe<StreamObserver>> observers_;
 
   // Size of the pipe buffer.
   int pipe_buffer_size_;
 
   // Period between pipe reads.
   base::TimeDelta capture_period_;
 
   // Time when capturing was started.
   base::TimeTicks started_time_;
 
@@ skipping 11 matching lines @@
 };
 
 // Destroys |audio_pipe_reader| on the audio thread.
 struct AudioPipeReaderTraits {
   static void Destruct(const AudioPipeReader* audio_pipe_reader);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_LINUX_AUDIO_PIPE_READER_H_