Remove CreateDefaultDisplay().

services/ui/ws/window_manager_window_tree_factory_set.cc

 // Copyright 2016 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/window_manager_window_tree_factory_set.h"
 
 #include "services/ui/ws/user_id_tracker_observer.h"
 #include "services/ui/ws/window_manager_window_tree_factory.h"
 #include "services/ui/ws/window_manager_window_tree_factory_set_observer.h"
 #include "services/ui/ws/window_server.h"
@@ skipping 62 matching lines @@
   observers_.AddObserver(observer);
 }
 
 void WindowManagerWindowTreeFactorySet::RemoveObserver(
     WindowManagerWindowTreeFactorySetObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void WindowManagerWindowTreeFactorySet::OnWindowManagerWindowTreeFactoryReady(
     WindowManagerWindowTreeFactory* factory) {
-  const bool is_first_valid_factory = !got_valid_factory_;
-  got_valid_factory_ = true;
   for (auto& observer : observers_)
     observer.OnWindowManagerWindowTreeFactoryReady(factory);
-
-  // Notify after other observers as WindowServer triggers other
-  // observers being added, which will have already processed the add.
-  if (is_first_valid_factory)
-    window_server_->OnFirstWindowManagerWindowTreeFactoryReady();
 }
 
 void WindowManagerWindowTreeFactorySet::OnUserIdRemoved(const UserId& id) {
   factories_.erase(id);
 }
 
 }  // namespace ws
 }  // namespace ui