+++ This bug was initially created as a clone of Bug #20554 +++

HTMLImageElement's constructor is currently defined as:

[NamedConstructor=Image(),
 NamedConstructor=Image(unsigned long width),
 NamedConstructor=Image(unsigned long width, unsigned long height)]
interface HTMLImageElement : HTMLElement {
...
};

It can probably simplified like this:

[NamedConstructor=Image(optional unsigned long width, optional unsigned long height)]
interface HTMLImageElement : HTMLElement {
...
};