Gallery: Split GalleryDataModel from gallery.js.

ui/file_manager/gallery/js/gallery_data_model_unittest.html

Index: ui/file_manager/gallery/js/gallery_data_model_unittest.html
diff --git a/ui/file_manager/gallery/js/gallery_item_unittest.html b/ui/file_manager/gallery/js/gallery_data_model_unittest.html
similarity index 71%
copy from ui/file_manager/gallery/js/gallery_item_unittest.html
copy to ui/file_manager/gallery/js/gallery_data_model_unittest.html
index 70ef7d0ffe0f4989752d529ba9a10829d3d5227a..d4565ca22a36006cbdc3c6bbd250472f9b62c148 100644
--- a/ui/file_manager/gallery/js/gallery_item_unittest.html
+++ b/ui/file_manager/gallery/js/gallery_data_model_unittest.html
@@ -7,17 +7,20 @@
 // Define mock Gallery class to define Gallery.Item class.
 var Gallery = function() {};
 </script>
-<!-- Should be loaded before volume_manager.js -->
-<script src="../../file_manager/common/js/volume_manager_common.js"></script>
-<!-- Others -->
+
 <script src="../../../webui/resources/js/assert.js"></script>
 <script src="../../../webui/resources/js/cr.js"></script>
 <script src="../../../webui/resources/js/cr/event_target.js"></script>
 <script src="../../../webui/resources/js/cr/ui/array_data_model.js"></script>
-<script src="../../../webui/resources/js/load_time_data.js"></script>
 <script src="../../file_manager/common/js/mock_entry.js"></script>
 <script src="../../file_manager/common/js/unittest_util.js"></script>
 <script src="../../file_manager/common/js/util.js"></script>
+<script src="../../file_manager/foreground/js/metadata/metadata_cache.js">
+</script>
+<script src="../../file_manager/foreground/js/metadata/mock_metadata_cache.js">
+</script>
+<script src="entry_list_watcher.js"></script>
+<script src="gallery_data_model.js"></script>
 <script src="gallery_item.js"></script>
 
-<script src="gallery_item_unittest.js"></script>
+<script src="gallery_data_model_unittest.js"></script>