Bug 860879 - Add UiThreadBlockedException and utility method to dump all stack traces; r=kats
Bug 860879 - Throw an exception after 5 seconds timeout when returning PromptService result; r=kats
Bug 867685 - Use getLock() instead of this when modifying the viewport metrics for clarity. r=Cwiiis
Bug 867685 - Ensure setIsRTL updates the viewport metrics atomically. r=Cwiiis