The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/89e5c1355eb4e2f8372b8fa63c394f4a11fef857

commit 89e5c1355eb4e2f8372b8fa63c394f4a11fef857
Author: Mitsuru Oshima <oshima@chromium.org>
Date: Wed Jan 17 07:29:39 2018

Compositor/Server Side Drag to move/resize

This CL implements a mode for a compositor to drive move/resize operation.

* compositor notifies start and end of drag operation with
  direction parameter.
  - "none" direction means move, otherwise resize.
* bounds updates are sent with reasons so that client can use
  proper bounds update scheme for each operation.
* Extends the hit test slightly outside (equivalent to outset but
  can extend further for otuch event).

This is backward compatible and will use the old mode for old clients.

BUG= 795119 
TEST=Tested with and without v10 protocol.

Change-Id: Icacfe4aeb91fa20e456531ed908cfc46dd3c2ce6
Reviewed-on: https://chromium-review.googlesource.com/787003
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: David Reveman <reveman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#529665}
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/ash/shell.h
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/ash/wm/drag_window_resizer.cc
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/ash/wm/toplevel_window_event_handler.cc
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/ash/wm/toplevel_window_event_handler.h
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/ash/wm/window_state.cc
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/ash/wm/window_state.h
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/ash/wm/window_state_delegate.h
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/ash/wm/wm_toplevel_window_event_handler.cc
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/ash/wm/wm_toplevel_window_event_handler.h
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/components/exo/client_controlled_shell_surface.cc
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/components/exo/client_controlled_shell_surface.h
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/components/exo/shell_surface_base.cc
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/components/exo/shell_surface_base.h
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/components/exo/wayland/server.cc
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/third_party/wayland-protocols/include/protocol/remote-shell-unstable-v1-client-protocol.h
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/third_party/wayland-protocols/include/protocol/remote-shell-unstable-v1-server-protocol.h
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/third_party/wayland-protocols/protocol/remote-shell-protocol.c
[modify] https://crrev.com/89e5c1355eb4e2f8372b8fa63c394f4a11fef857/third_party/wayland-protocols/unstable/remote-shell/remote-shell-unstable-v1.xml