Merge "API review feedback for ProgressBar" into nyc-dev am: 5500bb1d6d
am: c1a3af4546

* commit 'c1a3af4546782846ef94e4ffd960133107707a88':
  API review feedback for ProgressBar

Change-Id: I0bdf04c9e8a276479976d8647d208a7d95a4f506