Bug 881487.  Make anchor scrolls on wyciwyg documents work correctly.  r=smaug
Bug 957479.  Make pushState work correctly after document.open().  r=smaug
Bug 952365.  Add a TreatNonObjectAsNull annotation for WebIDL callback functions and use it for event handlers, since web sites depend on assigning non-callable objects to them in some cases.  r=peterv
Bug 957929.  Pass undefined, not null, as the this value to callbacks if no other value is provided.  r=peterv