Compile file_manager/common and volume_manager_wrapper in v2 syntax.

ui/file_manager/externs/file_browser_background.js

Index: ui/file_manager/externs/file_browser_background.js
diff --git a/ui/file_manager/externs/file_browser_background.js b/ui/file_manager/externs/file_browser_background.js
new file mode 100644
index 0000000000000000000000000000000000000000..7cfb7421100066133374cf295305334d7ea5c98a
--- /dev/null
+++ b/ui/file_manager/externs/file_browser_background.js
@@ -0,0 +1,17 @@
+// Copyright 2017 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.
+
+/**
+ * @constructor
+ * @struct
+ */
+var FileBrowserBackground = function() {};
+
+/**
+ * @param {function()} callback
+ */
+FileBrowserBackground.prototype.ready = function(callback) {};
+
+/** @type {!analytics.Tracker} */
+FileBrowserBackground.prototype.tracker;