Create a private API for controlling WebRTC's AEC3

content/renderer/media/aec_dump_message_filter.cc

Index: content/renderer/media/aec_dump_message_filter.cc
diff --git a/content/renderer/media/aec_dump_message_filter.cc b/content/renderer/media/aec_dump_message_filter.cc
index 91f529643c47c0d2b0c14370a81915e8c06cb844..95d59aa491b1914212ea500704d75eddd42cb5f5 100644
--- a/content/renderer/media/aec_dump_message_filter.cc
+++ b/content/renderer/media/aec_dump_message_filter.cc
@@ -89,6 +89,7 @@ bool AecDumpMessageFilter::OnMessageReceived(const IPC::Message& message) {
   IPC_BEGIN_MESSAGE_MAP(AecDumpMessageFilter, message)
     IPC_MESSAGE_HANDLER(AecDumpMsg_EnableAecDump, OnEnableAecDump)
     IPC_MESSAGE_HANDLER(AecDumpMsg_DisableAecDump, OnDisableAecDump)
+    IPC_MESSAGE_HANDLER(AudioProcessingMsg_EnableAec3, OnEnableAec3)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -130,6 +131,13 @@ void AecDumpMessageFilter::OnDisableAecDump() {
       FROM_HERE, base::Bind(&AecDumpMessageFilter::DoDisableAecDump, this));
 }
 
+void AecDumpMessageFilter::OnEnableAec3(int id, bool enable) {
+  DCHECK(io_task_runner_->BelongsToCurrentThread());
+  main_task_runner_->PostTask(
+      FROM_HERE,
+      base::Bind(&AecDumpMessageFilter::DoEnableAec3, this, id, enable));
+}
+
 void AecDumpMessageFilter::DoEnableAecDump(
     int id,
     IPC::PlatformFileForTransit file_handle) {
@@ -173,4 +181,12 @@ int AecDumpMessageFilter::GetIdForDelegate(
   return kInvalidDelegateId;
 }
 
+void AecDumpMessageFilter::DoEnableAec3(int id, bool enable) {
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
+  DelegateMap::iterator it = delegates_.find(id);
+  if (it != delegates_.end()) {
+    it->second->OnAec3Enable(enable);
+  }
+}
+
 }  // namespace content