Split out audio debug recording from RenderProcessHostImpl.

content/renderer/media/media_stream_audio_processor.cc

Index: content/renderer/media/media_stream_audio_processor.cc
diff --git a/content/renderer/media/media_stream_audio_processor.cc b/content/renderer/media/media_stream_audio_processor.cc
index 2df3604977c8daf5c3695af544c2831ac073210d..a32a6771952b9bcd1b4bb4c9ece0da4c88391a3f 100644
--- a/content/renderer/media/media_stream_audio_processor.cc
+++ b/content/renderer/media/media_stream_audio_processor.cc
@@ -282,12 +282,12 @@ MediaStreamAudioProcessor::MediaStreamAudioProcessor(
   render_thread_checker_.DetachFromThread();
   InitializeAudioProcessingModule(constraints, input_params);
 
-  aec_dump_message_filter_ = AecDumpMessageFilter::Get();
-  // In unit tests not creating a message filter, |aec_dump_message_filter_|
+  audio_debug_recorder_ = AudioDebugRecorder::Get();
+  // In unit tests not creating a message filter, |audio_debug_recorder_|
   // will be NULL. We can just ignore that. Other unit tests and browser tests
   // ensure that we do get the filter when we should.
-  if (aec_dump_message_filter_.get())
-    aec_dump_message_filter_->AddDelegate(this);
+  if (audio_debug_recorder_.get())
+    audio_debug_recorder_->AddDelegate(this);
 
   // Create and configure |audio_repetition_detector_|.
   std::vector<int> look_back_times;
@@ -379,9 +379,9 @@ void MediaStreamAudioProcessor::Stop() {
 
   stopped_ = true;
 
-  if (aec_dump_message_filter_.get()) {
-    aec_dump_message_filter_->RemoveDelegate(this);
-    aec_dump_message_filter_ = NULL;
+  if (audio_debug_recorder_.get()) {
+    audio_debug_recorder_->RemoveDelegate(this);
+    audio_debug_recorder_ = nullptr;
   }
 
   if (!audio_processing_.get())
@@ -392,7 +392,7 @@ void MediaStreamAudioProcessor::Stop() {
 
   if (playout_data_source_) {
     playout_data_source_->RemovePlayoutSink(this);
-    playout_data_source_ = NULL;
+    playout_data_source_ = nullptr;
   }
 }
 
@@ -404,11 +404,10 @@ const media::AudioParameters& MediaStreamAudioProcessor::OutputFormat() const {
   return output_format_;
 }
 
-void MediaStreamAudioProcessor::OnAecDumpFile(
-    const IPC::PlatformFileForTransit& file_handle) {
+void MediaStreamAudioProcessor::OnAecDumpFile(base::PlatformFile file_handle) {
   DCHECK(main_thread_checker_.CalledOnValidThread());
 
-  base::File file = IPC::PlatformFileForTransitToFile(file_handle);
+  base::File file(file_handle);
   DCHECK(file.IsValid());
 
   if (audio_processing_)
@@ -425,7 +424,7 @@ void MediaStreamAudioProcessor::OnDisableAecDump() {
 
 void MediaStreamAudioProcessor::OnIpcClosing() {
   DCHECK(main_thread_checker_.CalledOnValidThread());
-  aec_dump_message_filter_ = NULL;
+  audio_debug_recorder_ = nullptr;
 }
 
 void MediaStreamAudioProcessor::OnPlayoutData(media::AudioBus* audio_bus,