am d98d0fc6: Merge "Optimize VelocityTracker to run in linear time." into gingerbread

Merge commit 'd98d0fc6e9172d3f130794e499462c911920adf6' into gingerbread-plus-aosp

* commit 'd98d0fc6e9172d3f130794e499462c911920adf6':
  Optimize VelocityTracker to run in linear time.