Split surface id and simplify connecting to surfaces service

services/view_manager/display_manager.cc

Index: services/view_manager/display_manager.cc
diff --git a/services/view_manager/display_manager.cc b/services/view_manager/display_manager.cc
index ca4bdea3f3dd281576a1e199d05db35c2935d504..725194d1605fc2f19f9a1d04f1ab67db045763ba 100644
--- a/services/view_manager/display_manager.cc
+++ b/services/view_manager/display_manager.cc
@@ -139,8 +139,7 @@ void DefaultDisplayManager::Draw() {
     return;
   if (surface_id_.is_null()) {
     surface_id_ = surface_id_allocator_->GenerateId();
-    surface_->CreateSurface(mojo::SurfaceId::From(surface_id_),
-                            Size::From(size_));
+    surface_->CreateSurface(mojo::SurfaceId::From(surface_id_));
   }
 
   Rect rect;
@@ -178,6 +177,9 @@ void DefaultDisplayManager::OnSizeChanged(mojo::SizePtr size) {
   SchedulePaint(connection_manager_->root(), gfx::Rect(size_));
 }
 
+void DefaultDisplayManager::SetIdNamespace(uint32_t id_namespace) {
+}
+
 void DefaultDisplayManager::ReturnResources(
     mojo::Array<mojo::ReturnedResourcePtr> resources) {
   DCHECK_EQ(0u, resources.size());