AudioConverter: Express delay in frames rather than msec.

media/audio/virtual_audio_output_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_OUTPUT_STREAM_H_
 #define MEDIA_AUDIO_VIRTUAL_AUDIO_OUTPUT_STREAM_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
@@ skipping 29 matching lines @@
   // AudioOutputStream:
   bool Open() override;
   void Start(AudioSourceCallback* callback) override;
   void Stop() override;
   void SetVolume(double volume) override;
   void GetVolume(double* volume) override;
   void Close() override;
 
  private:
   // AudioConverter::InputCallback:
-  double ProvideInput(AudioBus* audio_bus,
-                      base::TimeDelta buffer_delay) override;
+  double ProvideInput(AudioBus* audio_bus, uint32_t frames_delayed) override;
 
   const AudioParameters params_;
   // Pointer to the VirtualAudioInputStream to attach to when Start() is called.
   // This pointer should always be valid because VirtualAudioInputStream should
   // outlive this class.
   VirtualAudioInputStream* const target_input_stream_;
 
   AfterCloseCallback after_close_cb_;
 
   AudioSourceCallback* callback_;
   double volume_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(VirtualAudioOutputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_VIRTUAL_AUDIO_OUTPUT_STREAM_H_