diff -r 000000000000 -r 6474c204b198 dom/webidl/ImageDocument.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/ImageDocument.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,44 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/.
+ *
+ * The origin of this IDL file is:
+ * content/html/document/public/nsIImageDocument.idl
+ */
+
+interface imgIRequest;
+
+[ChromeOnly, OverrideBuiltins]
+interface ImageDocument : HTMLDocument {
+  /* Whether the pref for image resizing has been set. */
+  readonly attribute boolean imageResizingEnabled;
+
+  /* Whether the image is overflowing visible area. */
+  readonly attribute boolean imageIsOverflowing;
+
+  /* Whether the image has been resized to fit visible area. */
+  readonly attribute boolean imageIsResized;
+
+  /* The image request being displayed in the content area */
+  [Throws]
+  readonly attribute imgIRequest? imageRequest;
+
+  /* Resize the image to fit visible area. */
+  void shrinkToFit();
+
+  /* Restore image original size. */
+  void restoreImage();
+
+  /* Restore the image, trying to keep a certain pixel in the same position.
+   * The coordinate system is that of the shrunken image.
+   */
+  void restoreImageTo(long x, long y);
+
+  /* A helper method for switching between states.
+   * The switching logic is as follows. If the image has been resized
+   * restore image original size, otherwise if the image is overflowing
+   * current visible area resize the image to fit the area.
+   */
+  void toggleImageSize();
+};