Bug 964875 part 1.  Add a WebIDL ChromeWindow interface for use in instanceof once Window is on WebIDL bindings.  r=peterv
Bug 964875 part 2.  Add a static nsGlobalWindow::IsChromeWindow test function for use in Func annotations.  r=peterv
Bug 964875 part 3.  Define WebIDL quickstubs for ChromeWindow.  r=peterv