Use "static_assert" in lieu of "COMPILE_ASSERT" in ash module

ash/wm/wm_types.cc

 // Copyright 2013 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/wm_types.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 
 namespace ash {
 namespace wm {
 
 // This is to catch the change to WindowShowState.
-COMPILE_ASSERT(
-    ui::SHOW_STATE_END ==
-    static_cast<ui::WindowShowState>(WINDOW_STATE_TYPE_END),
-    show_enum_mismatch);
+static_assert(ui::SHOW_STATE_END ==
+                  static_cast<ui::WindowShowState>(WINDOW_STATE_TYPE_END),
+              "show enum mismatch");
 
 WindowStateType ToWindowStateType(ui::WindowShowState state) {
   return static_cast<WindowStateType>(state);
 }
 
 ui::WindowShowState ToWindowShowState(WindowStateType type) {
   switch (type) {
     case WINDOW_STATE_TYPE_DEFAULT:
       return ui::SHOW_STATE_DEFAULT;
     case WINDOW_STATE_TYPE_NORMAL:
@@ skipping 18 matching lines @@
   return ui::SHOW_STATE_DEFAULT;
 }
 
 bool IsMaximizedOrFullscreenWindowStateType(WindowStateType type) {
   return type == WINDOW_STATE_TYPE_MAXIMIZED ||
       type == WINDOW_STATE_TYPE_FULLSCREEN;
 }
 
 }  // namespace wm
 }  // namespace ash