Bug 1083395 - Extract helpers function from the input-handling codepath. r=botond
Bug 1083395 - Extract an InputQueue class from the APZC input code. r=botond
Bug 1083395 - Replace the touch block balance with an input block identifier. r=botond
Bug 1083395 - Move to a single input queue owned by the APZCTM instead of many queues owned by APZC instances. r=botond
Bug 1083395 - Move some APZC functions that are no longer needed in production down to the test subclass. r=botond