Add window property for restore bounds when virtual keyboard is enabled.

ash/mus/bridge/wm_window_mus.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/mus/bridge/wm_window_mus.h"
 
 #include "ash/common/wm/container_finder.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_layout_manager.h"
 #include "ash/common/wm_transient_window_observer.h"
@@ skipping 349 matching lines @@
 
   if (key == WmWindowProperty::TOP_VIEW_INSET) {
     // TODO: need support for TOP_VIEW_INSET: http://crbug.com/615100.
     NOTIMPLEMENTED();
     return;
   }
 
   NOTREACHED();
 }
 
+gfx::Rect* WmWindowMus::GetRectProperty(WmWindowProperty key) {
+  NOTIMPLEMENTED();  // TODO: Add support; see crbug.com/638416
+  return nullptr;
+}
+
 ShelfItemDetails* WmWindowMus::GetShelfItemDetails() {
   NOTIMPLEMENTED();  // TODO: Add support; see crbug.com/634150
   return nullptr;
 }
 
 void WmWindowMus::SetShelfItemDetails(const ShelfItemDetails& details) {
   NOTIMPLEMENTED();  // TODO: Add support; see crbug.com/634150
 }
 
 void WmWindowMus::ClearShelfItemDetails() {
@@ skipping 492 matching lines @@
 }
 
 void WmWindowMus::OnTransientChildRemoved(ui::Window* window,
                                           ui::Window* transient) {
   FOR_EACH_OBSERVER(WmTransientWindowObserver, transient_observers_,
                     OnTransientChildRemoved(this, Get(transient)));
 }
 
 }  // namespace mus
 }  // namespace ash