chromeos: Changes DisplayManagerObserver to have a single function

services/ui/ws/display.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "services/ui/ws/display.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 206 matching lines @@
     // id works.
     window_manager_display_root_map_[service_manager::mojom::kRootUserID] =
         display_root_ptr.get();
     WindowTree* window_tree = binding_->CreateWindowTree(display_root->root());
     display_root->window_manager_state_ = window_tree->window_manager_state();
     window_tree->window_manager_state()->AddWindowManagerDisplayRoot(
         std::move(display_root_ptr));
   } else {
     CreateWindowManagerDisplayRootsFromFactories();
   }
-  display_manager()->OnDisplayUpdate(display_);
+  display_manager()->OnDisplayUpdated(display_);
 }
 
 void Display::CreateWindowManagerDisplayRootsFromFactories() {
   std::vector<WindowManagerWindowTreeFactory*> factories =
       window_server_->window_manager_window_tree_factory_set()->GetFactories();
   for (WindowManagerWindowTreeFactory* factory : factories) {
     if (factory->window_tree())
       CreateWindowManagerDisplayRootFromFactory(factory);
   }
 }
@@ skipping 169 matching lines @@
 
   UserActivityMonitor* activity_monitor =
       window_server_->GetUserActivityMonitorForUser(
           window_server_->user_id_tracker()->active_id());
   activity_monitor->OnUserActivity();
   return EventDispatchDetails();
 }
 
 }  // namespace ws
 }  // namespace ui