Replace more ObserverList with base::ObserverList.

remoting/host/linux/audio_pipe_reader.cc

 // 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.
 
 #include "remoting/host/linux/audio_pipe_reader.h"
 
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ skipping 30 matching lines @@
   task_runner->PostTask(
       FROM_HERE, base::Bind(&AudioPipeReader::StartOnAudioThread, pipe_reader));
   return pipe_reader;
 }
 
 AudioPipeReader::AudioPipeReader(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner,
     const base::FilePath& pipe_path)
     : task_runner_(task_runner),
       pipe_path_(pipe_path),
-      observers_(new ObserverListThreadSafe<StreamObserver>()) {
+      observers_(new base::ObserverListThreadSafe<StreamObserver>()) {
 }
 
 AudioPipeReader::~AudioPipeReader() {}
 
 void AudioPipeReader::AddObserver(StreamObserver* observer) {
   observers_->AddObserver(observer);
 }
 void AudioPipeReader::RemoveObserver(StreamObserver* observer) {
   observers_->RemoveObserver(observer);
 }
@@ skipping 140 matching lines @@
       pipe_.GetPlatformFile(), false, base::MessageLoopForIO::WATCH_READ,
       &file_descriptor_watcher_, this);
 }
 
 // static
 void AudioPipeReaderTraits::Destruct(const AudioPipeReader* audio_pipe_reader) {
   audio_pipe_reader->task_runner_->DeleteSoon(FROM_HERE, audio_pipe_reader);
 }
 
 }  // namespace remoting