Gets mash to use WmToplevelWindowEventHandler

mash/wm/bridge/wm_globals_mus.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 "mash/wm/bridge/wm_globals_mus.h"
 
 #include "ash/wm/common/window_resizer.h"
 #include "ash/wm/common/wm_activation_observer.h"
 #include "ash/wm/common/wm_shell_window_ids.h"
+#include "base/memory/ptr_util.h"
 #include "components/mus/common/util.h"
 #include "components/mus/public/cpp/window.h"
 #include "components/mus/public/cpp/window_tree_connection.h"
 #include "mash/wm/bridge/wm_root_window_controller_mus.h"
 #include "mash/wm/bridge/wm_window_mus.h"
 #include "mash/wm/container_ids.h"
+#include "mash/wm/drag_window_resizer.h"
 #include "mash/wm/public/interfaces/container.mojom.h"
 #include "mash/wm/root_window_controller.h"
 
 namespace mash {
 namespace wm {
 
 WmGlobalsMus::WmGlobalsMus(mus::WindowTreeConnection* connection)
     : connection_(connection) {
   connection_->AddObserver(this);
   WmGlobals::Set(this);
@@ skipping 96 matching lines @@
 }
 
 void WmGlobalsMus::RecordUserMetricsAction(
     ash::wm::WmUserMetricsAction action) {
   NOTIMPLEMENTED();
 }
 
 std::unique_ptr<ash::WindowResizer> WmGlobalsMus::CreateDragWindowResizer(
     std::unique_ptr<ash::WindowResizer> next_window_resizer,
     ash::wm::WindowState* window_state) {
-  NOTIMPLEMENTED();
-  return next_window_resizer;
+  return base::WrapUnique(
+      new DragWindowResizer(std::move(next_window_resizer), window_state));
 }
 
 bool WmGlobalsMus::IsOverviewModeSelecting() {
   NOTIMPLEMENTED();
   return false;
 }
 
 bool WmGlobalsMus::IsOverviewModeRestoringMinimizedWindows() {
   NOTIMPLEMENTED();
   return false;
@@ skipping 59 matching lines @@
 }
 
 void WmGlobalsMus::OnWillDestroyConnection(
     mus::WindowTreeConnection* connection) {
   DCHECK_EQ(connection, connection_);
   RemoveConnectionObserver();
 }
 
 }  // namespace wm
 }  // namespace mash