Fix remaining incompatibilities between scoped_ptr and unique_ptr.

media/audio/sounds/audio_stream_handler.cc

 // 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.
 
 #include "media/audio/sounds/audio_stream_handler.h"
 
 #include <stdint.h>
 #include <string>
 #include <utility>
 
@@ skipping 186 matching lines @@
     AudioManager::Get()->GetTaskRunner()->PostTask(
         FROM_HERE, base::Bind(&AudioStreamContainer::Stop,
                               base::Unretained(stream_.get())));
     AudioManager::Get()->GetTaskRunner()->DeleteSoon(FROM_HERE,
                                                      stream_.release());
   }
 }
 
 bool AudioStreamHandler::IsInitialized() const {
   DCHECK(CalledOnValidThread());
-  return stream_;
+  return !!stream_;
 }
 
 bool AudioStreamHandler::Play() {
   DCHECK(CalledOnValidThread());
 
   if (!IsInitialized())
     return false;
 
   AudioManager::Get()->GetTaskRunner()->PostTask(
       FROM_HERE,
@@ skipping 23 matching lines @@
   g_observer_for_testing = observer;
 }
 
 // static
 void AudioStreamHandler::SetAudioSourceForTesting(
     AudioOutputStream::AudioSourceCallback* source) {
   g_audio_source_for_testing = source;
 }
 
 }  // namespace media