Future-proof the rIC API and make it extensible

[igrigorik]

requestIdleCallback(IdleRequestCallback callback, optional unsigned long timeout);

Problem: Current API signature takes an optional timeout value, which makes it impossible to extend this API in the future with other optional or required parameters.

Proposal: move timeout into an optional dictionary…

requestIdleCallback(IdleRequestCallback callback, optional IdleRequestOptions options);

dictionary IdleRequestOptions {
             optional unsigned long timeout;
};

[rmcilroy]

SGTM. @toddreifsteck, any objections?

[igrigorik]

/cc @eliperelman @bzbarsky

[bzbarsky]

If you really wanted to, you could even support both:

requestIdleCallback(IdleRequestCallback callback, unsigned long timeout);
requestIdleCallback(IdleRequestCallback callback, optional IdleRequestOptions options);

No idea whether you want that. Just having the dictionary is probably fine.

[igrigorik]

FWIW, given that we're working with clean slate here, I'd vote for dictionary only -- reduces confusion.

[eliperelman]

@igrigorik no objections. I'm also fine with dictionary-only.

[rmcilroy]

Change uploaded to address this in #22

[toddreifsteck]

Perfect! LGTM

[igrigorik]

Resolved via #22, closing.