The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/001f50f635f2e97346c8d3303e68bd2c3cec776e

commit 001f50f635f2e97346c8d3303e68bd2c3cec776e
Author: juncai <juncai@chromium.org>
Date: Thu Sep 29 05:15:16 2016

Show "Paired" for already paired WebUSB devices on the chooser

Since the chooser can show "Paired" text for the already paired devices,
WebUSB can use this feature now. This CL added code to do that.

BUG= 649502 

Review-Url: https://codereview.chromium.org/2352393006
Cr-Commit-Position: refs/heads/master@{#421753}

[modify] https://crrev.com/001f50f635f2e97346c8d3303e68bd2c3cec776e/chrome/browser/usb/usb_chooser_controller.cc
[modify] https://crrev.com/001f50f635f2e97346c8d3303e68bd2c3cec776e/chrome/browser/usb/usb_chooser_controller.h
[modify] https://crrev.com/001f50f635f2e97346c8d3303e68bd2c3cec776e/chrome/browser/usb/web_usb_permission_provider.cc
[modify] https://crrev.com/001f50f635f2e97346c8d3303e68bd2c3cec776e/chrome/browser/usb/web_usb_permission_provider.h