Add a instance groups to Connect(), and introduce an Identity struct.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 82e5f3c7d7c56356a2a91f83b494eee776317cac..6b89e3b6cc5b4d6f112a3a9c76b56e17d6793018 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -6088,8 +6088,11 @@ mojo::shell::mojom::InterfaceProviderPtr RenderFrameImpl::ConnectToApplication(
   if (!connector_)
     GetServiceRegistry()->ConnectToRemoteService(mojo::GetProxy(&connector_));
   mojo::shell::mojom::InterfaceProviderPtr interface_provider;
-  connector_->Connect(url.spec(), mojo::shell::mojom::kInheritUserID,
-                      GetProxy(&interface_provider), nullptr,
+  mojo::shell::mojom::IdentityPtr target(mojo::shell::mojom::Identity::New());
+  target->name = url.spec();
+  target->user_id = mojo::shell::mojom::kInheritUserID;
+  target->instance = "";
+  connector_->Connect(std::move(target), GetProxy(&interface_provider), nullptr,
                       base::Bind(&OnGotInstanceID));
   return interface_provider;
 }