Support the Aec dump for the APM in chrome

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 b0212b79d6a0c132d8c05c7da249ab75a4d661aa..665586beceb92770c45ee2e8fdbd6742f978babf 100644
--- a/content/renderer/media/media_stream_audio_processor.cc
+++ b/content/renderer/media/media_stream_audio_processor.cc
@@ -188,6 +188,17 @@ const media::AudioParameters& MediaStreamAudioProcessor::OutputFormat() const {
   return capture_converter_->sink_parameters();
 }
 
+void MediaStreamAudioProcessor::StartAecDump(
+    const base::PlatformFile& aec_dump_file) {
+  if (audio_processing_)
+    StartEchoCancellationDump(audio_processing_.get(), aec_dump_file);
+}
+
+void MediaStreamAudioProcessor::StopAecDump() {
+  if (audio_processing_)
+    StopEchoCancellationDump(audio_processing_.get());
+}
+
 void MediaStreamAudioProcessor::OnPlayoutData(media::AudioBus* audio_bus,
                                               int sample_rate,
                                               int audio_delay_milliseconds) {
@@ -430,6 +441,8 @@ void MediaStreamAudioProcessor::StopAudioProcessing() {
   if (!audio_processing_.get())
     return;
 
+  StopAecDump();
+
   if (playout_data_source_)
     playout_data_source_->RemovePlayoutSink(this);