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..e41643ee9cfbef5f5b318bd5ec8dc936e1c1061c 100644
--- a/content/renderer/media/aec_dump_message_filter.cc
+++ b/content/renderer/media/aec_dump_message_filter.cc
@@ -48,6 +48,10 @@ void AecDumpMessageFilter::AddDelegate(
   int id = delegate_id_counter_++;
   delegates_[id] = delegate;
 
+  if (override_aec3_) {
+    delegate->OnAec3Enable(*override_aec3_);
+  }
+
   io_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&AecDumpMessageFilter::RegisterAecDumpConsumer, this, id));
@@ -89,6 +93,7 @@ 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 +135,13 @@ 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 +185,13 @@ 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);
+  }
+  override_aec3_ = enable;
+}
+
 }  // namespace content