The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/65c2ce1ca7982e79650154f609785e2b4fcc46fc

commit 65c2ce1ca7982e79650154f609785e2b4fcc46fc
Author: lgcheng <lgcheng@google.com>
Date: Fri Nov 03 17:28:02 2017

String update for Arc optin.

Current greeting tile is confusing in arc loading page. Update the
string.

Bug:  780651 
Test: Manual
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I6377c31730e66da26ec470c8af48e56f41066b7d
Reviewed-on: https://chromium-review.googlesource.com/750080
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Long Cheng <lgcheng@google.com>
Cr-Commit-Position: refs/heads/master@{#513818}
[modify] https://crrev.com/65c2ce1ca7982e79650154f609785e2b4fcc46fc/chrome/app/chromeos_strings.grdp
[modify] https://crrev.com/65c2ce1ca7982e79650154f609785e2b4fcc46fc/chrome/browser/chromeos/arc/arc_support_host.cc
[modify] https://crrev.com/65c2ce1ca7982e79650154f609785e2b4fcc46fc/chrome/browser/resources/chromeos/arc_support/main.html

Verified on M64 dev build (10115.0.0, 64.0.3264.0).