Move InterfaceProvider into the shell::mojom namespace like the rest of the shell interfaces.

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 36d8c661f11981a329d3a1dafb2d6132dd3b7db2..ad62a834866319646a7e172d19e780af344e67f2 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -2113,10 +2113,10 @@ void RenderFrameHostImpl::SetUpMojoIfNeeded() {
   GetProcess()->GetServiceRegistry()->ConnectToRemoteService(
       mojo::GetProxy(&setup));
 
-  mojo::InterfaceProviderPtr exposed_services;
+  mojo::shell::mojom::InterfaceProviderPtr exposed_services;
   service_registry_->Bind(GetProxy(&exposed_services));
 
-  mojo::InterfaceProviderPtr services;
+  mojo::shell::mojom::InterfaceProviderPtr services;
   setup->ExchangeInterfaceProviders(routing_id_, GetProxy(&services),
                                     std::move(exposed_services));
   service_registry_->BindRemoteServiceProvider(std::move(services));