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

content/child/mojo/mojo_application.cc

Index: content/child/mojo/mojo_application.cc
diff --git a/content/child/mojo/mojo_application.cc b/content/child/mojo/mojo_application.cc
index 8efc0049326b32534270f54725fffc2785997433..555720624caaf232162960cb67de370234597202 100644
--- a/content/child/mojo/mojo_application.cc
+++ b/content/child/mojo/mojo_application.cc
@@ -50,8 +50,8 @@ void MojoApplication::OnActivate(
   application_setup.Bind(
       mojo::InterfacePtrInfo<ApplicationSetup>(std::move(pipe), 0u));
 
-  mojo::InterfaceProviderPtr services;
-  mojo::InterfaceProviderPtr exposed_services;
+  mojo::shell::mojom::InterfaceProviderPtr services;
+  mojo::shell::mojom::InterfaceProviderPtr exposed_services;
   service_registry_.Bind(GetProxy(&exposed_services));
   application_setup->ExchangeInterfaceProviders(GetProxy(&services),
                                                 std::move(exposed_services));