Quick View: Add more metadata and update UI.

ui/file_manager/file_manager/foreground/elements/files_metadata_entry.js

Index: ui/file_manager/file_manager/foreground/elements/files_metadata_entry.js
diff --git a/ui/file_manager/file_manager/foreground/elements/files_metadata_entry.js b/ui/file_manager/file_manager/foreground/elements/files_metadata_entry.js
new file mode 100644
index 0000000000000000000000000000000000000000..9529411f17d06879ed51ad326985b929337180b2
--- /dev/null
+++ b/ui/file_manager/file_manager/foreground/elements/files_metadata_entry.js
@@ -0,0 +1,21 @@
+// 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.
+
+var FilesMetadataBox = Polymer({
+  is: 'files-metadata-entry',
+
+  properties: {
+    key: {
+      type: String,
+      reflectToAttribtue: true,
+    },
+
+    // If |value| is empty, the entire entry will be hidden.
+    value: {
+      type: String,
+      reflectToAttribtue: true,
+    },
+  },
+
+});