The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/796733012dd7fe6edf6e5360087447f3a2d187e1

commit 796733012dd7fe6edf6e5360087447f3a2d187e1
Author: juncai <juncai@chromium.org>
Date: Wed Jul 20 22:30:46 2016

Change ChooserController::Observer to ChooserController::View

Based on the comment from:
https://codereview.chromium.org/2155743002/

This CL changes ChooserController::Observer to ChooserController::View
to better reflect its purpose, since ChooserController needs to update
its view when necessary.

BUG= 629878 

Review-Url: https://codereview.chromium.org/2163683005
Cr-Commit-Position: refs/heads/master@{#406696}

[modify] https://crrev.com/796733012dd7fe6edf6e5360087447f3a2d187e1/chrome/browser/chooser_controller/chooser_controller.h
[modify] https://crrev.com/796733012dd7fe6edf6e5360087447f3a2d187e1/chrome/browser/chooser_controller/mock_chooser_controller.cc
[modify] https://crrev.com/796733012dd7fe6edf6e5360087447f3a2d187e1/chrome/browser/ui/bluetooth/bluetooth_chooser_controller.cc
[modify] https://crrev.com/796733012dd7fe6edf6e5360087447f3a2d187e1/chrome/browser/ui/cocoa/chooser_content_view_cocoa.mm
[modify] https://crrev.com/796733012dd7fe6edf6e5360087447f3a2d187e1/chrome/browser/ui/views/chooser_content_view.cc
[modify] https://crrev.com/796733012dd7fe6edf6e5360087447f3a2d187e1/chrome/browser/ui/views/chooser_content_view.h
[modify] https://crrev.com/796733012dd7fe6edf6e5360087447f3a2d187e1/chrome/browser/usb/usb_chooser_controller.cc