Bug 859675.  Return the canonical nsISupports from ToSupports(SpeechRecognition).  r=smaug
Bug 859617.  Make WebGLContext's primary nsISupports its canonical nsISupports.  r=khuey
Bug 857417.  Trigger a fatal assertion when wrapping a wrappercached and nsISupports WebIDL object which has the wrapper cache before the nsISupports in its object layout.  r=khuey