mash: Move ShelfWindowWatcher[ItemDelegate] to ash/common.

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_window_observer.h"
@@ skipping 337 matching lines @@
 void WmWindowMus::SetIntProperty(WmWindowProperty key, int value) {
   if (key == WmWindowProperty::SHELF_ID) {
     NOTIMPLEMENTED();
     return;
   }
 
   NOTREACHED();
 }
 
 ShelfItemDetails* WmWindowMus::GetShelfItemDetails() {
-  NOTIMPLEMENTED();
+  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() {
+  NOTIMPLEMENTED();  // TODO: Add support; see crbug.com/634150
+}
+
 const wm::WindowState* WmWindowMus::GetWindowState() const {
   return window_state_.get();
 }
 
 WmWindow* WmWindowMus::GetToplevelWindow() {
   return WmShellMus::GetToplevelAncestor(window_);
 }
 
 WmWindow* WmWindowMus::GetToplevelWindowForFocus() {
   // TODO(sky): resolve if we really need two notions of top-level. In the mus
@@ skipping 446 matching lines @@
 void WmWindowMus::OnWindowDestroying(ui::Window* window) {
   FOR_EACH_OBSERVER(WmWindowObserver, observers_, OnWindowDestroying(this));
 }
 
 void WmWindowMus::OnWindowDestroyed(ui::Window* window) {
   FOR_EACH_OBSERVER(WmWindowObserver, observers_, OnWindowDestroyed(this));
 }
 
 }  // namespace mus
 }  // namespace ash