The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f7bf1d6fe4d505410b560cefcee2312fc759b4f8

commit f7bf1d6fe4d505410b560cefcee2312fc759b4f8
Author: estade <estade@chromium.org>
Date: Fri Dec 09 20:25:40 2016

Remove Ash shelf dimmer.

BUG= 671718 

Review-Url: https://codereview.chromium.org/2550413004
Cr-Commit-Position: refs/heads/master@{#437621}

[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/BUILD.gn
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/aura/wm_shelf_aura.cc
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/aura/wm_shelf_aura.h
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/shelf/app_list_button.cc
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/shelf/overflow_button.cc
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/shelf/shelf_layout_manager.cc
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/shelf/shelf_view.cc
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/shelf/shelf_view.h
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/shelf/shelf_widget.cc
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/shelf/shelf_widget.h
[delete] https://crrev.com/7af445f71d1af6b6be39a5f59c1def3ac113b3d0/ash/common/shelf/wm_dimmer_view.h
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/shelf/wm_shelf.cc
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/shelf/wm_shelf.h
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/common/system/tray/tray_background_view.cc
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/resources/ash_resources.grd
[delete] https://crrev.com/7af445f71d1af6b6be39a5f59c1def3ac113b3d0/ash/resources/default_100_percent/common/shelf/shelf_dimming.png
[delete] https://crrev.com/7af445f71d1af6b6be39a5f59c1def3ac113b3d0/ash/resources/default_100_percent/common/shelf/status_icon_background_onblack_normal.png
[delete] https://crrev.com/7af445f71d1af6b6be39a5f59c1def3ac113b3d0/ash/resources/default_100_percent/common/shelf/status_launcher_icon_background_onblack_normal.png
[delete] https://crrev.com/7af445f71d1af6b6be39a5f59c1def3ac113b3d0/ash/resources/default_200_percent/common/shelf/shelf_dimming.png
[delete] https://crrev.com/7af445f71d1af6b6be39a5f59c1def3ac113b3d0/ash/resources/default_200_percent/common/shelf/status_icon_background_onblack_normal.png
[delete] https://crrev.com/7af445f71d1af6b6be39a5f59c1def3ac113b3d0/ash/resources/default_200_percent/common/shelf/status_launcher_icon_background_onblack_normal.png
[delete] https://crrev.com/7af445f71d1af6b6be39a5f59c1def3ac113b3d0/ash/shelf/dimmer_view.cc
[delete] https://crrev.com/7af445f71d1af6b6be39a5f59c1def3ac113b3d0/ash/shelf/dimmer_view.h
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/shelf/shelf_layout_manager_unittest.cc
[modify] https://crrev.com/f7bf1d6fe4d505410b560cefcee2312fc759b4f8/ash/wm/overview/window_selector_unittest.cc