Use local ids for Surfaces APIs that can only apply to local surfaces

services/fake_surfaces/fake_surfaces_service_application.h

Index: services/fake_surfaces/fake_surfaces_service_application.h
diff --git a/services/fake_surfaces/fake_surfaces_service_application.h b/services/fake_surfaces/fake_surfaces_service_application.h
index 5e7934ec774af3929efd619f84ec6c6e056ac970..e807b16b1b4f30726b3228e551bfdad6bd185cf1 100644
--- a/services/fake_surfaces/fake_surfaces_service_application.h
+++ b/services/fake_surfaces/fake_surfaces_service_application.h
@@ -18,7 +18,8 @@ namespace fake_surfaces {
 
 class FakeSurfacesServiceApplication
     : public mojo::ApplicationDelegate,
-      public mojo::InterfaceFactory<mojo::SurfacesService> {
+      public mojo::InterfaceFactory<mojo::SurfacesService>,
+      public mojo::InterfaceFactory<mojo::Surface> {
  public:
   FakeSurfacesServiceApplication();
   ~FakeSurfacesServiceApplication() override;
@@ -32,6 +33,10 @@ class FakeSurfacesServiceApplication
   void Create(mojo::ApplicationConnection* connection,
               mojo::InterfaceRequest<mojo::SurfacesService> request) override;
 
+  // InterfaceFactory<mojo::Surface> implementation.
+  void Create(mojo::ApplicationConnection* connection,
+              mojo::InterfaceRequest<mojo::Surface> request) override;
+
  private:
   uint32_t next_id_namespace_;