The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/bb4136e0c21892060dfd1dc60c42b9344239bbc7

commit bb4136e0c21892060dfd1dc60c42b9344239bbc7
Author: Yuwei Huang <yuweih@chromium.org>
Date: Wed Jun 28 23:03:08 2017

[CRD iOS] Add the host refresh indicator

This CL adds the HostFetchingViewController that shows a spinner when the host
list is being fetched.

Bug:  737728 
Change-Id: Ic554a8e01abe0b47ad1a19656a1b421f7cc98484
Reviewed-on: https://chromium-review.googlesource.com/553477
Reviewed-by: Scott Nichols <nicholss@chromium.org>
Commit-Queue: Yuwei Huang <yuweih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#483184}
[modify] https://crrev.com/bb4136e0c21892060dfd1dc60c42b9344239bbc7/remoting/ios/app/BUILD.gn
[add] https://crrev.com/bb4136e0c21892060dfd1dc60c42b9344239bbc7/remoting/ios/app/host_fetching_view_controller.h
[add] https://crrev.com/bb4136e0c21892060dfd1dc60c42b9344239bbc7/remoting/ios/app/host_fetching_view_controller.mm
[modify] https://crrev.com/bb4136e0c21892060dfd1dc60c42b9344239bbc7/remoting/ios/app/remoting_theme.h
[modify] https://crrev.com/bb4136e0c21892060dfd1dc60c42b9344239bbc7/remoting/ios/app/remoting_theme.mm
[modify] https://crrev.com/bb4136e0c21892060dfd1dc60c42b9344239bbc7/remoting/ios/app/remoting_view_controller.mm

Verified in 63.0.3220.0