Convert DnDUploaderView to ES6

Review Request #8096 — Created April 3, 2016 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x
a4c7702...

Reviewers

This conversion is in preparation for integration of the
ucps/dkus/dnd-inline-images branch.

  • Ran unit tests.
  • Used this in conjunction with the changes in the inline-images branch.