AudioConverter: Express delay in frames rather than msec.

content/renderer/media/speech_recognition_audio_sink.h

 // Copyright 2014 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 CONTENT_RENDERER_MEDIA_SPEECH_RECOGNITION_AUDIO_SINK_H_
 #define CONTENT_RENDERER_MEDIA_SPEECH_RECOGNITION_AUDIO_SINK_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 44 matching lines @@
   // content::MediaStreamAudioSink implementation.
   void OnReadyStateChanged(
       blink::WebMediaStreamSource::ReadyState state) override;
 
   void OnData(const media::AudioBus& audio_bus,
               base::TimeTicks estimated_capture_time) override;
   void OnSetFormat(const media::AudioParameters& params) override;
 
   // media::AudioConverter::Inputcallback implementation.
   double ProvideInput(media::AudioBus* audio_bus,
-                      base::TimeDelta buffer_delay) override;
+                      uint32_t frames_delayed) override;
 
   // Returns the pointer to the audio input buffer mapped in the shared memory.
   media::AudioInputBuffer* GetAudioInputBuffer() const;
 
   // Number of frames per buffer in FIFO. When the buffer is full we convert and
   // consume it on the |output_bus_|. Size of the buffer depends on the
   // resampler. Example: for 44.1 to 16.0 conversion, it should be 4100 frames.
   int fifo_buffer_size_;
 
   // Used to DCHECK that some methods are called on the main render thread.
@@ skipping 35 matching lines @@
 
   // Callback for the renderer client. Called when the audio track was stopped.
   const OnStoppedCB on_stopped_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionAudioSink);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_SPEECH_RECOGNITION_AUDIO_SINK_H_