Fixing bug 855611. Convert navigator.plugins and navigator.mimeTypes to use new DOM bindings. r=peterv@propagandism.org.
Bug 891119 - IonMonkey: Small cleanups, delete unused (and buggy) code. r=h4writer
Bug 891119 - IonMonkey: Simplify RegisterSet usage by using takeUnchecked instead of has and take. r=h4writer