Add externs for gallery.

ui/file_manager/externs/common.js

Index: ui/file_manager/externs/common.js
diff --git a/chrome/browser/resources/chromeos/braille_ime/externs.js b/ui/file_manager/externs/common.js
similarity index 50%
copy from chrome/browser/resources/chromeos/braille_ime/externs.js
copy to ui/file_manager/externs/common.js
index 38f08853b6fa1ec13a8bcc615427eef6f6951f32..c7d5df1267f5cf48a9c8cf85b804b397c2a30648 100644
--- a/chrome/browser/resources/chromeos/braille_ime/externs.js
+++ b/ui/file_manager/externs/common.js
@@ -2,12 +2,19 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Externs which are common for all applications under ui/file_manager.

[fukino, 2014/12/22 03:30:09]

Could you divide externs file which defines properties for each window? For
example, file_manager_foreground.js?

[yawano, 2014/12/22 04:04:41]

Done. Removed externs/common.js.

+
 /**
- * @fileoverview Externs for the braille IME.
- * @externs
+ * @type {string}
  */
+Window.prototype.appID;
 
 /**
  * @type {Object}
  */
-var localStorage;
+Window.prototype.appState;
+
+/**
+ * @type {string}
+ */
+Entry.prototype.cachedUrl;