Nathan Froyd 1fc1d9b4d3 Bug 1393885 - provide a faster path for do_GetWeakReference; r=erahm ...

NS_GetWeakReference, called from do_GetWeakReference, QI's its argument
to nsISupportsWeakReference to determine whether a weak reference can be
obtained.  If NS_GetWeakReference is already receiving a
nsISupportsWeakReference pointer, or something than can be converted to
one, then we can skip the QI for a small performance win.

2017-09-05 15:39:40 -04:00

3.1 KiB

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