Browser test dry runs with mojo audio streams.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index c5c6b04749a9de5743278470bc877171e85f9b35..fbd52c507b259ace03d6d8a721d1e10cce2e06e1 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -2830,6 +2830,12 @@ void RenderFrameHostImpl::RegisterMojoInterfaces() {
       base::Bind(&IgnoreInterfaceRequest<device::mojom::VRService>));
 #endif
 
+  if (RendererAudioOutputStreamFactoryContextImpl::UseMojoFactories()) {
+    GetInterfaceRegistry()->AddInterface(base::BindRepeating(
+        &RenderFrameHostImpl::CreateAudioOutputStreamFactory,
+        base::Unretained(this)));
+  }
+
 #if BUILDFLAG(ENABLE_WEBRTC)
   // BrowserMainLoop::GetInstance() may be null on unit tests.
   if (BrowserMainLoop::GetInstance()) {
@@ -3829,6 +3835,15 @@ void RenderFrameHostImpl::ResetFeaturePolicy() {
       parent_policy, container_policy, last_committed_origin_);
 }
 
+void RenderFrameHostImpl::CreateAudioOutputStreamFactory(
+    const service_manager::BindSourceInfo& source_info,
+    mojom::RendererAudioOutputStreamFactoryRequest request) {
+  RenderProcessHostImpl* process =
+      static_cast<RenderProcessHostImpl*>(GetProcess());
+  audio_output_stream_factory_ = process->CreateAudioOutputStreamFactory(
+      GetRoutingID(), std::move(request));
+}
+
 void RenderFrameHostImpl::BindMediaInterfaceFactoryRequest(
     const service_manager::BindSourceInfo& source_info,
     media::mojom::InterfaceFactoryRequest request) {