Chrome Version: ToT as of 2017-08-07
OS: All but iOS

What steps will reproduce the problem?

Suppose that we have HTMLCollection.idl like:

interface HTMLCollection {
    ...
    getter Element? item(unsigned long index);
    getter Element? namedItem(DOMString name);
};

And we have HTMLOptionCollection.idl like:

interface HTMLOptionsCollection : HTMLCollection {
    ... No getters and setters ...
};

If we generate binding code with these IDLs, generated HTMLOptionCollection interface doesn't have getters.

Please use labels and text to provide additional information.

Workaround: Add getters and setters to inherited interfaces.