De-Client Surface interface

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 207ab8ce24e39615277ded0a0eee06175f0c5bdc..674c0facb9b9b5d0b9cc0d664ab948b458a535fc 100644
--- a/services/view_manager/display_manager.cc
+++ b/services/view_manager/display_manager.cc
@@ -99,7 +99,8 @@ void DefaultDisplayManager::Init(ConnectionManager* connection_manager) {
   native_viewport_->Show();
 
   app_connection_->ConnectToService("mojo:surfaces_service", &surface_);
-  surface_.set_client(this);
+  surface_->GetIdNamespace(base::Bind(&DefaultDisplayManager::SetIdNamespace,
+                                      base::Unretained(this)));
 
   mojo::NativeViewportEventDispatcherPtr event_dispatcher;
   app_connection_->ConnectToService(&event_dispatcher);
@@ -193,11 +194,6 @@ void DefaultDisplayManager::SetIdNamespace(uint32_t id_namespace) {
   }
 }
 
-void DefaultDisplayManager::ReturnResources(
-    mojo::Array<mojo::ReturnedResourcePtr> resources) {
-  DCHECK_EQ(0u, resources.size());
-}
-
 void DefaultDisplayManager::OnConnectionError() {
   // This is called when the native_viewport is torn down before
   // ~DefaultDisplayManager may be called.