The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fd82957ce10daaff873fc0dbd97330f82e154327

commit fd82957ce10daaff873fc0dbd97330f82e154327
Author: Takumi Fujimoto <takumif@chromium.org>
Date: Thu Sep 06 17:36:37 2018

[Harmony Cast Dialog] Update the "no devices found" view to match the mocks

Per the mocks, move the throbber and the info icon to the left of the view.
Also factor out constants and throbber creating code into a helper file.
Screencap: https://drive.google.com/open?id=1UF1uamxoR0oG-3aEHwdJkoHU_7pJW_CB

Bug:  879630 
Change-Id: I42ee54d063df0f9af74cad10a4a21a9a8f78a869
Reviewed-on: https://chromium-review.googlesource.com/1199945
Commit-Queue: Takumi Fujimoto <takumif@chromium.org>
Reviewed-by: Derek Cheng <imcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589206}
[modify] https://crrev.com/fd82957ce10daaff873fc0dbd97330f82e154327/chrome/browser/ui/BUILD.gn
[add] https://crrev.com/fd82957ce10daaff873fc0dbd97330f82e154327/chrome/browser/ui/views/media_router/cast_dialog_helper.cc
[add] https://crrev.com/fd82957ce10daaff873fc0dbd97330f82e154327/chrome/browser/ui/views/media_router/cast_dialog_helper.h
[modify] https://crrev.com/fd82957ce10daaff873fc0dbd97330f82e154327/chrome/browser/ui/views/media_router/cast_dialog_no_sinks_view.cc
[modify] https://crrev.com/fd82957ce10daaff873fc0dbd97330f82e154327/chrome/browser/ui/views/media_router/cast_dialog_sink_button.cc
[modify] https://crrev.com/fd82957ce10daaff873fc0dbd97330f82e154327/chrome/browser/ui/views/media_router/cast_dialog_sink_button.h