We want to get rid of DOMError (bug 1120178). Let's see if it's used infrequently enough. We should track calls to the constructor, which will throw if removed; and to .name and .message, because those behave differently for DOMException. The natural thing to track all this would be use counters, but those don't seem to currently support tracking constructor calls. Thus I'll block this on bug 1175033.

Comment on attachment 8896720 [details] Bug 1388391 - Track DOMError usage with telemetry; https://reviewboard.mozilla.org/r/168016/#review173416 ::: dom/base/DOMError.cpp:72 (Diff revision 1) > ErrorResult& aRv) > { > nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobal.GetAsSupports()); > > + if (window) { > + nsCOMPtr<nsIDocument> doc = window->GetDoc(); GetExtantDoc

Comment on attachment 8896720 [details] Bug 1388391 - Track DOMError usage with telemetry; https://reviewboard.mozilla.org/r/168016/#review174178 This is [Category 1](https://wiki.mozilla.org/Firefox/Data_Collection#Data_Collection_Categories) data. datareview+

Pushed by ayg@aryeh.name: https://hg.mozilla.org/integration/autoland/rev/417e576cfa1e Track DOMError usage with telemetry; r=francois,smaug

I accidentally landed the version without the GetDoc -> GetExtantDoc fix. I'm trying to get someone to back it out or push a followup.

Backout by cbook@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/17c3cd3b69b6 Backed out changeset 417e576cfa1e on developers request

Pushed by ayg@aryeh.name: https://hg.mozilla.org/integration/autoland/rev/79823f111dab Track DOMError usage with telemetry; r=francois,smaug