mash: Move LauncherItemController to ash, rename ShelfItemDelegate.

ash/common/shelf/shelf_window_watcher_item_delegate.cc

Index: ash/common/shelf/shelf_window_watcher_item_delegate.cc
diff --git a/ash/common/shelf/shelf_window_watcher_item_delegate.cc b/ash/common/shelf/shelf_window_watcher_item_delegate.cc
index 88be8b7f780bad730d53bee3451549dd1b58ff28..da968d45470200eef89f3d4e132e8464c0a51c35 100644
--- a/ash/common/shelf/shelf_window_watcher_item_delegate.cc
+++ b/ash/common/shelf/shelf_window_watcher_item_delegate.cc
@@ -28,7 +28,7 @@ ShelfItemType GetShelfItemType(ShelfID id) {
 
 ShelfWindowWatcherItemDelegate::ShelfWindowWatcherItemDelegate(ShelfID id,
                                                                WmWindow* window)
-    : id_(id), window_(window) {
+    : ShelfItemDelegate(AppLaunchId()), id_(id), window_(window) {
   DCHECK_NE(kInvalidShelfID, id_);
   DCHECK(window_);
 }