mus ws: Move 'reset(new' to base::MakeUnique.

services/ui/ws/window_tree.cc

 // Copyright 2014 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_tree.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 112 matching lines @@
 void WindowTree::ConfigureWindowManager() {
   // ConfigureWindowManager() should be called early on, before anything
   // else. |waiting_for_top_level_window_info_| must be null as if
   // |waiting_for_top_level_window_info_| is non-null it means we're about to
   // create an associated interface, which doesn't work with pause/resume.
   // TODO(sky): DCHECK temporary until 626869 is sorted out.
   DCHECK(!waiting_for_top_level_window_info_);
   DCHECK(!window_manager_internal_);
   window_manager_internal_ = binding_->GetWindowManager();
   window_manager_internal_->OnConnect(id_);
-  window_manager_state_.reset(new WindowManagerState(this));
+  window_manager_state_ = base::MakeUnique<WindowManagerState>(this);
 }
 
 const ServerWindow* WindowTree::GetWindow(const WindowId& id) const {
   if (id_ == id.client_id) {
     auto iter = created_window_map_.find(id);
     return iter == created_window_map_.end() ? nullptr : iter->second;
   }
   return window_server_->GetWindow(id);
 }
 
@@ skipping 1763 matching lines @@
   client()->OnCompleteDrop(client_window_id.id, event_flags, cursor_offset,
                            effect_bitmask, callback);
 }
 
 void WindowTree::PerformOnDragDropDone() {
   client()->OnDragDropDone();
 }
 
 }  // namespace ws
 }  // namespace ui