The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/828394031639b3305df4fbae8a41d6c730003262

commit 828394031639b3305df4fbae8a41d6c730003262
Author: msw <msw@chromium.org>
Date: Tue Aug 30 18:57:29 2016

mash: Port ash_sysui ShelfDelegateMus impl to mojo:ash.

Migrate ash/sysui/shelf_delegate_mus.* to ash/mus.
Move mash/shelf/public/interfaces to ash/public/interfaces.
Merge shelf_constants.mojom and shelf.mojom.

Add ShelfController/ShelfObserver multi-display support.
Add ShelfObserver::OnShelfCreated mojo interface.
Add EnumTraits for alignment and auto-hide behavior.

Remove redundant ash/shelf_layout_manager*
Inline RootWindowController::OnShelfWindowAvailable.

BUG= 557406 , 614182 , 615155 , 616857 
TEST=Mash shelf shows chrome icon; no cros changes.
R=jamescook@chromium.org,sky@chromium.org
TBR=tsepez@chromium.org

Review-Url: https://codereview.chromium.org/2259153002
Cr-Commit-Position: refs/heads/master@{#415378}

[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/BUILD.gn
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/DEPS
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/root_window_controller.cc
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/root_window_controller.h
[add] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/shelf_delegate_mus.cc
[add] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/shelf_delegate_mus.h
[delete] https://crrev.com/316099ac4e77dabe98f7ea49cf5fdccab6f93876/ash/mus/shelf_layout_manager.cc
[delete] https://crrev.com/316099ac4e77dabe98f7ea49cf5fdccab6f93876/ash/mus/shelf_layout_manager.h
[delete] https://crrev.com/316099ac4e77dabe98f7ea49cf5fdccab6f93876/ash/mus/shelf_layout_manager_delegate.h
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/shell_delegate_mus.cc
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/test/wm_test_helper.cc
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/window_manager_application.cc
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/mus/window_manager_application.h
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/public/interfaces/BUILD.gn
[rename] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/public/interfaces/shelf.mojom
[add] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/public/interfaces/shelf.typemap
[add] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/public/interfaces/shelf_enum_traits.h
[add] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/public/interfaces/typemaps.gni
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/sysui/BUILD.gn
[delete] https://crrev.com/316099ac4e77dabe98f7ea49cf5fdccab6f93876/ash/sysui/shelf_delegate_mus.cc
[delete] https://crrev.com/316099ac4e77dabe98f7ea49cf5fdccab6f93876/ash/sysui/shelf_delegate_mus.h
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/sysui/shell_delegate_mus.cc
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/sysui/sysui_application.cc
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/ash/sysui/sysui_application.h
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/chrome/app/mojo/chrome_manifest.json
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/chrome/browser/ui/BUILD.gn
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/chrome/browser/ui/ash/launcher/chrome_mash_shelf_controller.cc
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/chrome/browser/ui/ash/launcher/chrome_mash_shelf_controller.h
[delete] https://crrev.com/316099ac4e77dabe98f7ea49cf5fdccab6f93876/mash/shelf/public/interfaces/BUILD.gn
[delete] https://crrev.com/316099ac4e77dabe98f7ea49cf5fdccab6f93876/mash/shelf/public/interfaces/shelf_constants.mojom
[modify] https://crrev.com/828394031639b3305df4fbae8a41d6c730003262/mojo/public/tools/bindings/chromium_bindings_configuration.gni

Mike, is this still an issue?

Let's call this WontFix as per the removal of docked windows:
  https://codereview.chromium.org/2700523004/ (and issue 668355)