Bug 988724: Remove webidl updating bits from client.py that are long dead. r=glandium
Bug 989224: Note orphaned FragmentOrElements in the CC log. r=bz
Bug 847138: Cycle collect SVGZoomEvent. r=smaug
Bug 847138: Test. r=khuey
Bug 990330: Remove event listener to avoid leaking in test_bug_771294.xul. r=ehsan