Use template specialization to generate WindowProperty code

athena/screen/modal_window_controller.cc

 // Copyright 2014 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 "athena/screen/modal_window_controller.h"
 
 #include "athena/screen/public/screen_manager.h"
 #include "base/message_loop/message_loop.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/wm/core/window_animations.h"
 
+DECLARE_WINDOW_PROPERTY_TYPE(athena::ModalWindowController*);
+
 namespace athena {
 namespace {
 
 DEFINE_OWNED_WINDOW_PROPERTY_KEY(ModalWindowController,
                                  kModalWindowControllerKey,
                                  nullptr);
 
 }  // namespace
 
 // static
@@ skipping 117 matching lines @@
     // recreate layers for the container so that animation can continue
     // even if the container is removed immediately.
     wm::ScopedHidingAnimationSettings settings(modal_container_);
     settings.layer_animation_settings()->SetTransitionDuration(
         base::TimeDelta::FromMilliseconds(kDimmAnimationDurationMs));
     modal_container_->layer()->SetOpacity(0.0f);
   }
 }
 
 }  // namespace athena