Removes unnecessary function in WmWindow

ash/wm/aura/wm_window_aura.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 "ash/wm/aura/wm_window_aura.h"
 
 #include "ash/screen_util.h"
 #include "ash/shelf/shelf_util.h"
 #include "ash/wm/aura/aura_layout_manager_adapter.h"
 #include "ash/wm/aura/wm_globals_aura.h"
@@ skipping 339 matching lines @@
 }
 
 void WmWindowAura::SetRestoreBoundsInScreen(const gfx::Rect& bounds) {
   window_->SetProperty(aura::client::kRestoreBoundsKey, new gfx::Rect(bounds));
 }
 
 gfx::Rect WmWindowAura::GetRestoreBoundsInScreen() const {
   return *window_->GetProperty(aura::client::kRestoreBoundsKey);
 }
 
-void WmWindowAura::OnWMEvent(const wm::WMEvent* event) {
-  ash::wm::GetWindowState(window_)->OnWMEvent(event);
-}
-
 bool WmWindowAura::Contains(const WmWindow* other) const {
   return other
              ? window_->Contains(
                    static_cast<const WmWindowAura*>(other)->window_)
              : false;
 }
 
 void WmWindowAura::SetShowState(ui::WindowShowState show_state) {
   window_->SetProperty(aura::client::kShowStateKey, show_state);
 }
@@ skipping 182 matching lines @@
 }
 
 void WmWindowAura::OnWindowVisibilityChanging(aura::Window* window,
                                               bool visible) {
   FOR_EACH_OBSERVER(WmWindowObserver, observers_,
                     OnWindowVisibilityChanging(this, visible));
 }
 
 }  // namespace wm
 }  // namespace ash