Adds WmWindow and converts WindowState to use it

ash/wm/ash_focus_rules.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/ash_focus_rules.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/window_state.h"
+#include "ash/wm/window_state_aura.h"
 #include "ui/aura/window.h"
 
 namespace ash {
 namespace wm {
 namespace {
 
 // These are the list of container ids of containers which may contain windows
 // that need to be activated in the order that they should be activated.
 const int kWindowContainerIds[] = {
     kShellWindowId_OverlayContainer,
@@ skipping 160 matching lines @@
     if (*i != ignore &&
         window_state->CanActivate() &&
         !window_state->IsMinimized())
       return *i;
   }
   return NULL;
 }
 
 }  // namespace wm
 }  // namespace ash