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

ash/common/shelf/shelf_window_watcher_item_delegate.cc

Index: ash/common/shelf/shelf_window_watcher_item_delegate.cc
diff --git a/ash/shelf/shelf_window_watcher_item_delegate.cc b/ash/common/shelf/shelf_window_watcher_item_delegate.cc
similarity index 91%
rename from ash/shelf/shelf_window_watcher_item_delegate.cc
rename to ash/common/shelf/shelf_window_watcher_item_delegate.cc
index b40783323cc863d5c9867ef72733bbbd7a4ff4c7..91a12e39e5310e894cdc5075d54e2356e28de99f 100644
--- a/ash/shelf/shelf_window_watcher_item_delegate.cc
+++ b/ash/common/shelf/shelf_window_watcher_item_delegate.cc
@@ -2,13 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ash/shelf/shelf_window_watcher_item_delegate.h"
+#include "ash/common/shelf/shelf_window_watcher_item_delegate.h"
 
+#include "ash/common/shelf/shelf_item_types.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_window.h"
-#include "ash/shelf/shelf_util.h"
 #include "ui/events/event.h"
-#include "ui/wm/core/window_animations.h"
 
 namespace ash {