Create a private API for controlling WebRTC's AEC3

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index ede70ada11303dfea53c00bb16ed53491a313293..214749d07116b7ab2d24d3b63c024ebc862e14bd 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -2343,6 +2343,19 @@ bool RenderProcessHostImpl::StopWebRTCEventLog() {
   return webrtc_eventlog_host_.StopWebRTCEventLog();
 }
 
+void RenderProcessHostImpl::SetEchoCanceller3(bool enable) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  // Piggybacking on AEC dumps.
+  // TODO(hlundin): Change name for aec_dump_consumers_;
+  // http://crbug.com/709919.
+  for (std::vector<int>::iterator it = aec_dump_consumers_.begin();
+       it != aec_dump_consumers_.end(); ++it) {
+    Send(new AudioProcessingMsg_EnableAec3(*it, enable));
+  }
+  override_aec3_ = base::Optional<bool>(enable);
+}
+
 void RenderProcessHostImpl::SetWebRtcLogMessageCallback(
     base::Callback<void(const std::string&)> callback) {
 #if BUILDFLAG(ENABLE_WEBRTC)
@@ -2996,6 +3009,9 @@ void RenderProcessHostImpl::RegisterAecDumpConsumerOnUIThread(int id) {
         WebRTCInternals::GetInstance()->GetAudioDebugRecordingsFilePath());
     EnableAecDumpForId(file_with_extensions, id);
   }
+  if (override_aec3_) {
+    Send(new AudioProcessingMsg_EnableAec3(id, *override_aec3_));
+  }
 }
 
 void RenderProcessHostImpl::UnregisterAecDumpConsumerOnUIThread(int id) {