Better way to implement FrameConnectedBluetoothDevicesTest

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 f7d3b40074eeb7d0e01260b6d91c20fb432c1905..0b3beee3448b2e0731a2e584864a89ff6d772579 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -1963,9 +1963,9 @@ void RenderFrameHostImpl::RegisterMojoServices() {
 #endif
 
   if (enable_web_bluetooth) {
-    GetServiceRegistry()->AddService(
-        base::Bind(&RenderFrameHostImpl::CreateWebBluetoothService,
-                   base::Unretained(this)));
+    GetServiceRegistry()->AddService(base::Bind(
+        base::IgnoreResult(&RenderFrameHostImpl::CreateWebBluetoothService),
+        base::Unretained(this)));
   }
 
   if (!frame_mojo_shell_)
@@ -2800,7 +2800,7 @@ void RenderFrameHostImpl::AXContentTreeDataToAXTreeData(
   dst->focused_tree_id = focused_frame->GetAXTreeID();
 }
 
-void RenderFrameHostImpl::CreateWebBluetoothService(
+WebBluetoothServiceImpl* RenderFrameHostImpl::CreateWebBluetoothService(
     blink::mojom::WebBluetoothServiceRequest request) {
   DCHECK(!web_bluetooth_service_);
   web_bluetooth_service_.reset(
@@ -2810,6 +2810,7 @@ void RenderFrameHostImpl::CreateWebBluetoothService(
   // handler after it's destroyed so it can't run after the RFHI is destroyed.
   web_bluetooth_service_->SetClientConnectionErrorHandler(base::Bind(
       &RenderFrameHostImpl::DeleteWebBluetoothService, base::Unretained(this)));
+  return web_bluetooth_service_.get();
 }
 
 void RenderFrameHostImpl::DeleteWebBluetoothService() {