Chrome browser flick boost

- For Chrome browser scroll detect if its a drag or a fling.
- Based on scroll type calculate boost duration.
- For fling boost duration calculation take fling velocity in to account
  (small fling will be boosted for short duration and long
   fling will be boosted for longer duration).

Change-Id: Ib6cd047c2b058e21748e63e6d733d6a17c4ffad2