Make WindowTree::SetModal() take the type.

ui/aura/window.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 "ui/aura/window.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 638 matching lines @@
 
 std::unique_ptr<ui::PropertyData> Window::BeforePropertyChange(
     const void* key) {
   return port_ ? port_->OnWillChangeProperty(key) : nullptr;
 }
 
 void Window::AfterPropertyChange(const void* key,
                                  int64_t old_value,
                                  std::unique_ptr<ui::PropertyData> data) {
   if (port_)
-    port_->OnPropertyChanged(key, std::move(data));
+    port_->OnPropertyChanged(key, old_value, std::move(data));
   for (WindowObserver& observer : observers_)
     observer.OnWindowPropertyChanged(this, key, old_value);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // Window, private:
 
 bool Window::HitTest(const gfx::Point& local_point) {
   gfx::Rect local_bounds(bounds().size());
   if (!delegate_ || !delegate_->HasHitTestMask())
@@ skipping 415 matching lines @@
     layer_name = "Unnamed Window";
 
   if (id_ != -1)
     layer_name += " " + base::IntToString(id_);
 
   layer()->set_name(layer_name);
 #endif
 }
 
 }  // namespace aura