AudioConverter: Express delay in frames rather than msec.

media/audio/simple_sources.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_SIMPLE_SOURCES_H_
 #define MEDIA_AUDIO_SIMPLE_SOURCES_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 64 matching lines @@
   // This memory needs to survive for the lifetime of |wav_audio_handler_|,
   // so declare it first. Do not access this member directly.
   std::unique_ptr<char[]> raw_wav_data_;
 
   std::unique_ptr<WavAudioHandler> wav_audio_handler_;
   std::unique_ptr<AudioConverter> file_audio_converter_;
   int wav_file_read_pos_;
   bool load_failed_;
 
   // Provides audio data from wav_audio_handler_ into the file audio converter.
-  double ProvideInput(AudioBus* audio_bus,
-                      base::TimeDelta buffer_delay) override;
+  double ProvideInput(AudioBus* audio_bus, uint32_t frames_delayed) override;
 
   // Loads the wav file on the first OnMoreData invocation.
   void LoadWavFile(const base::FilePath& path_to_wav_file);
 };
 
 class BeepingSource : public AudioOutputStream::AudioSourceCallback {
  public:
   BeepingSource(const AudioParameters& params);
   ~BeepingSource() override;
 
@@ skipping 11 matching lines @@
   base::TimeTicks last_callback_time_;
   base::TimeDelta interval_from_last_beep_;
   int beep_duration_in_buffers_;
   int beep_generated_in_buffers_;
   int beep_period_in_frames_;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_SIMPLE_SOURCES_H_