Update all the Web IDL - Part Two

[Zirro]

Updates for the remaining Web IDL after #2053 handles the nodes/ directory. An exception is Attr.webidl, which I've left unchanged as it depends on the work from #1822.

[Zirro]

Mainly changes to formatting in this one, but here are other changes of potential consequence:

Event

• The timeStamp attribute uses DOMHighResTimeStamp instead of DOMTimeStamp

UIEvent

• No longer has a modifierOS boolean

FileReader

• error attribute changed from using DOMError to DOMException

History

• The third argument of pushState() and replaceState() takes a USVString instead of DOMString

[domenic]

The timeStamp change also came with a spec change that might be worth implementing: whatwg/dom@912d587

[Zirro]

Okay, I believe I can do that this weekend.

EDIT: The change proved more difficult than initially anticipated, since every event will need to be aware of when window was created. I'll probably revert that line for now.

[Zirro]

Updated to revert the DOMTimeStamp -> DOMHighResTimeStamp change for now since it appears to require many changes to event constructors and the code leading up to them.