diff -r 000000000000 -r 6474c204b198 dom/webidl/CaretPosition.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/CaretPosition.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+interface CaretPosition {
+
+  /**
+   * The offsetNode could potentially be null due to anonymous content.
+   */
+  readonly attribute Node? offsetNode;
+  readonly attribute unsigned long offset;
+
+};
+
+/**
+ * Gecko specific methods and properties for CaretPosition.
+ */
+partial interface CaretPosition {
+  DOMRect? getClientRect();
+};