Allow multiple webRequest handlers

[sentialx]

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Problem Description

There's no way to register multiple webRequest events such as onBeforeRequest

Proposed Solution

It would be great if Electron could provide normal EventEmitter object. For example:

session.webRequest.on('before-request', ...)

[eatmyvenom]

Really this would take a while for it to become a thing, you could probably just create a new event emitter object that calls all of the web request methods you want. That is until this gets added.

[sentialx]

This issue may be resolved for me by #19447 when chrome.webRequest will be implemented

[jordansissel]

I ran into this tonight. It would be lovely to have this behavior documented. Today's my first day with electron and I'm not sure yet where the docs live, so this seemed a good place to mention docs.