Bug 1447341 - make page-icon protocol handler support weak referencing, r=mak

MozReview-Commit-ID: EpPJl89Gi1v

--HG--
extra : rebase_source : 011d65bfe28514449fb279b1c50e69de3e109e61

toolkit/components/places/PageIconProtocolHandler.js

@@ -125,7 +125,8 @@ PageIconProtocolHandler.prototype = {
 
   classID: Components.ID("{60a1f7c6-4ff9-4a42-84d3-5a185faa6f32}"),
   QueryInterface: XPCOMUtils.generateQI([
-    Ci.nsIProtocolHandler
+    Ci.nsIProtocolHandler,
+    Ci.nsISupportsWeakReference,
   ])
 };