tree 9daaf6b9edfda28334c54d76007c6c829d532aae
parent 50905ba30cbb083645deb57de09e57003d12d19d
author btolsch <btolsch@chromium.org> 1533329196 -0700
committer Brandon Tolsch <btolsch@chromium.org> 1533333596 +0000

Clean up a few ScreenListener items

This change makes ScreenListener take its observer in its constructor
instead of using a setter.  It also introduces the
DISALLOW_COPY_AND_ASSIGN macro and uses it for ScreenListener.

Change-Id: I58eda199a5d703be52320b1dcbce48ec4e74608d
Reviewed-on: https://chromium-review.googlesource.com/1162748
Reviewed-by: mark a. foltz <mfoltz@chromium.org>