Add WindowPinType property on arua::Window

ash/common/wm_window.cc

 // Copyright 2016 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/common/wm_window.h"
 
 #include "ash/aura/aura_layout_manager_adapter.h"
 #include "ash/aura/wm_shell_aura.h"
 #include "ash/common/ash_constants.h"
 #include "ash/common/wm/window_state.h"
@@ skipping 758 matching lines @@
                                        intptr_t old) {
   if (key == aura::client::kShowStateKey) {
     ash::wm::GetWindowState(window_)->OnWindowShowStateChanged();
     return;
   }
   if (key == aura::client::kImmersiveFullscreenKey) {
     bool enable = window_->GetProperty(aura::client::kImmersiveFullscreenKey);
     GetWindowState()->set_in_immersive_fullscreen(enable);
     return;
   }
+  if (key == kWindowPinTypeKey) {
+    ash::wm::GetWindowState(window_)->OnWindowPinTypeChanged();
+    return;
+  }
 }
 
 void WmWindow::OnTransientChildAdded(aura::Window* window,
                                      aura::Window* transient) {
   for (auto& observer : transient_observers_)
     observer.OnTransientChildAdded(this, Get(transient));
 }
 
 void WmWindow::OnTransientChildRemoved(aura::Window* window,
                                        aura::Window* transient) {
   for (auto& observer : transient_observers_)
     observer.OnTransientChildRemoved(this, Get(transient));
 }
 
 }  // namespace ash