Internet Explorer does not implement these and it would be nice to get rid of them everywhere I think.
Created attachment 466006 [details] [diff] [review] Patch v1 Unsurprisingly, we don't appear to have tests for this.
Comment on attachment 466006 [details] [diff] [review] Patch v1 We might actually want to keep binary compatibility here, unfortunately. So simply prefix the attributes in the idl with [noscript] and add a comment stating that these are DEPRECATED. Then keep implementations, but make them simply return NS_ERROR_NOT_IMPLEMENTED or some such. I know this interface isn't marked FROZEN, and that FROZEN doesn't even mean very much any more, but I strongly suspect there are addons that use this interface. r=me with that changed.
Comment on attachment 466006 [details] [diff] [review] Patch v1 We already broke them in bug 582303, so I don't see how preserving binary compat here would be useful.
Ok, let's stick with this patch then.
Comment on attachment 466006 [details] [diff] [review] Patch v1 This is pure risk now, please wait until after branching.
This doesn't apply cleanly any more.
Clean-up visible in the content/html/content/src/nsHTMLImageElement.cpp dom/interfaces/html/nsIDOMHTMLImageElement.idl files.
This caused bug 731832.
Was it intended to WONTFIX on backout? Seems pretty unusual to me ;)