Fork a subset of ash/shelf for use in mash.

mash/shelf/shelf_item_types.cc

Index: mash/shelf/shelf_item_types.cc
diff --git a/mash/shelf/shelf_item_types.cc b/mash/shelf/shelf_item_types.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6d9a14ad00e1b70f5e8da48923441f9fcc980aa9
--- /dev/null
+++ b/mash/shelf/shelf_item_types.cc
@@ -0,0 +1,21 @@
+// Copyright 2014 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 "mash/shelf/shelf_item_types.h"
+
+#include "mash/shelf/shelf_constants.h"
+
+namespace mash {
+namespace shelf {
+
+ShelfItem::ShelfItem()
+    : type(TYPE_UNDEFINED),
+      id(kInvalidShelfID),
+      status(STATUS_CLOSED),
+      window_id(0) {}
+
+ShelfItem::~ShelfItem() {}
+
+}  // namespace shelf
+}  // namespace mash