Do not pass the string device_id via IPC message to create an audio input stream

content/renderer/media/webaudio_capturer_source.cc

 // 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.
 
 #include "content/renderer/media/webaudio_capturer_source.h"
 
 #include "base/logging.h"
 #include "content/renderer/media/webrtc_audio_capturer.h"
 
 using media::AudioBus;
@@ skipping 29 matching lines @@
     capturer_->Start();
   } else {
     // TODO(crogers): Handle more than just the mono and stereo cases.
     LOG(WARNING) << "WebAudioCapturerSource::setFormat() : unhandled format.";
   }
 }
 
 void WebAudioCapturerSource::Initialize(
     const media::AudioParameters& params,
     media::AudioCapturerSource::CaptureCallback* callback,
-    media::AudioCapturerSource::CaptureEventHandler* event_handler) {
+    int session_id) {
   // The downstream client should be configured the same as what WebKit
   // is feeding it.
   DCHECK_EQ(set_format_channels_, params.channels());
 
   base::AutoLock auto_lock(lock_);
   params_ = params;
   callback_ = callback;
   wrapper_bus_ = AudioBus::CreateWrapper(params.channels());
   capture_bus_ = AudioBus::Create(params);
   fifo_.reset(new AudioFifo(params.channels(), kFifoSize));
@@ skipping 34 matching lines @@
 
   fifo_->Push(wrapper_bus_.get());
   int capture_frames = params_.frames_per_buffer();
   while (fifo_->frames() >= capture_frames) {
     fifo_->Consume(capture_bus_.get(), 0, capture_frames);
     callback_->Capture(capture_bus_.get(), 0, 1.0);
   }
 }
 
 }  // namespace content