The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c362c846e8f3691a869993c67dae583af16cb78a

commit c362c846e8f3691a869993c67dae583af16cb78a
Author: Tommy Steimel <steimel@chromium.org>
Date: Wed Nov 28 01:44:11 2018

[Global Media Controls] Split KeyboardHook into modifier/media impls

This CL creates a new type of KeyboardHook to listen to media keys.
KeyboardHook::Create is split in two, providing access to each type of
KeyboardHook. This creates the media hook implementation for Windows,
and returns nullptr for other platforms.

Bug:  903582 
Change-Id: I5eb6bbd94ec23dd54867eeb9ced585bc1b726961
Reviewed-on: https://chromium-review.googlesource.com/c/1333118
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Joe Downing <joedow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611500}
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/chrome/test/BUILD.gn
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/aura/window_tree_host_platform.cc
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/BUILD.gn
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/android/keyboard_hook_android.cc
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/keyboard_hook.h
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/keyboard_hook_base.cc
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/keyboard_hook_base.h
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/mac/keyboard_hook_mac.mm
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/ozone/keyboard_hook_ozone.cc
[delete] https://crrev.com/b06aeeafb4536a7fbc49111e62e49d1a45af403e/ui/events/win/keyboard_hook_win.h
[add] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/win/keyboard_hook_win_base.cc
[add] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/win/keyboard_hook_win_base.h
[add] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/win/media_keyboard_hook_win.cc
[add] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/win/media_keyboard_hook_win_interactive_test.cc
[add] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/win/media_keyboard_hook_win_unittest.cc
[rename] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/win/modifier_keyboard_hook_win.cc
[rename] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/win/modifier_keyboard_hook_win_unittest.cc
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/events/x/keyboard_hook_x11.cc
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
[modify] https://crrev.com/c362c846e8f3691a869993c67dae583af16cb78a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc