Clean up potentially leaky use of base::DeletePointer.

media/audio/virtual_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.
 
 #ifndef MEDIA_AUDIO_VIRTUAL_AUDIO_INPUT_STREAM_H_
 #define MEDIA_AUDIO_VIRTUAL_AUDIO_INPUT_STREAM_H_
 
 #include <map>
 #include <set>
 
@@ skipping 13 matching lines @@
 namespace media {
 
 class LoopbackAudioConverter;
 class VirtualAudioOutputStream;
 
 // VirtualAudioInputStream converts and mixes audio from attached
 // VirtualAudioOutputStreams into a single stream. It will continuously render
 // audio until this VirtualAudioInputStream is stopped and closed.
 class MEDIA_EXPORT VirtualAudioInputStream : public AudioInputStream {
  public:
-  // Callback invoked just after VirtualAudioInputStream is closed.
-  typedef base::Callback<void(VirtualAudioInputStream* vais)>
-      AfterCloseCallback;
-
   // Construct a target for audio loopback which mixes multiple data streams
   // into a single stream having the given |params|.  |worker_task_runner| is
   // the task runner on which AudioInputCallback methods are called and may or
   // may not be the single thread that invokes the AudioInputStream methods.
   VirtualAudioInputStream(
       const AudioParameters& params,
       const scoped_refptr<base::SingleThreadTaskRunner>& worker_task_runner,
-      const AfterCloseCallback& after_close_cb);
+      bool delete_on_close);
 
   ~VirtualAudioInputStream() override;
 
   // AudioInputStream:
   bool Open() override;
   void Start(AudioInputCallback* callback) override;
   void Stop() override;
   void Close() override;
   double GetMaxVolume() override;
   void SetVolume(double volume) override;
@@ skipping 18 matching lines @@
 
   typedef std::map<AudioParameters, LoopbackAudioConverter*> AudioConvertersMap;
 
   // Pulls audio data from all attached VirtualAudioOutputStreams, mixes and
   // converts the streams into one, and pushes the result to |callback_|.
   // Invoked on the worker thread.
   void PumpAudio();
 
   const scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner_;
 
-  AfterCloseCallback after_close_cb_;
+  const bool delete_on_close_;
 
   AudioInputCallback* callback_;
 
   // Non-const for testing.
   scoped_ptr<uint8[]> buffer_;
   AudioParameters params_;
 
   // Guards concurrent access to the converter network: converters_, mixer_, and
   // num_attached_output_streams_.
   base::Lock converter_network_lock_;
@@ skipping 15 matching lines @@
   scoped_ptr<AudioBus> audio_bus_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(VirtualAudioInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_VIRTUAL_AUDIO_INPUT_STREAM_H_