chromeos: Move files in //ash/common to //ash, part 2

ash/wm/system_modal_container_event_filter.cc

 // Copyright (c) 2012 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/system_modal_container_event_filter.h"
-#include "ash/common/wm_shell.h"
 #include "ash/wm/system_modal_container_event_filter_delegate.h"
+#include "ash/wm_shell.h"
 #include "ui/aura/window.h"
 #include "ui/events/event.h"
 
 namespace ash {
 
 SystemModalContainerEventFilter::SystemModalContainerEventFilter(
     SystemModalContainerEventFilterDelegate* delegate)
     : delegate_(delegate) {}
 
 SystemModalContainerEventFilter::~SystemModalContainerEventFilter() {}
 
 void SystemModalContainerEventFilter::OnEvent(ui::Event* event) {
   // Only filter modal events if a modal window is open.
   if (!WmShell::Get()->IsSystemModalWindowOpen())
     return;
   aura::Window* target = static_cast<aura::Window*>(event->target());
   if (!delegate_->CanWindowReceiveEvents(target))
     event->StopPropagation();
 }
 
 }  // namespace ash