arc: Implement proper Arc window activation for task moving to front.

components/exo/wayland/server.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/exo/wayland/server.h"
 
 #include <grp.h>
 #include <linux/input.h>
 #include <stddef.h>
 #include <stdint.h>
@@ skipping 1501 matching lines @@
 
 void remote_surface_set_system_modal(wl_client* client, wl_resource* resource) {
   GetUserDataAs<ShellSurface>(resource)->SetSystemModal(true);
 }
 
 void remote_surface_unset_system_modal(wl_client* client,
                                        wl_resource* resource) {
   GetUserDataAs<ShellSurface>(resource)->SetSystemModal(false);
 }
 
+void remote_surface_activate(wl_client* client, wl_resource* resource) {
+  GetUserDataAs<ShellSurface>(resource)->Activate();
+}
+
 const struct zwp_remote_surface_v1_interface remote_surface_implementation = {
     remote_surface_destroy,
     remote_surface_set_app_id,
     remote_surface_set_window_geometry,
     remote_surface_set_scale,
     remote_surface_fullscreen,
     remote_surface_maximize,
     remote_surface_minimize,
     remote_surface_restore,
     remote_surface_pin,
     remote_surface_unpin,
     remote_surface_unfullscreen,
     remote_surface_set_rectangular_shadow,
     remote_surface_set_title,
     remote_surface_set_top_inset,
     remote_surface_set_system_modal,
-    remote_surface_unset_system_modal};
+    remote_surface_unset_system_modal,
+    remote_surface_activate};
 
 ////////////////////////////////////////////////////////////////////////////////
 // notification_surface_interface:
 
 void notification_surface_destroy(wl_client* client, wl_resource* resource) {
   wl_resource_destroy(resource);
 }
 
 const struct zwp_notification_surface_v1_interface
     notification_surface_implementation = {notification_surface_destroy};
@@ skipping 282 matching lines @@
                          wl_resource_get_version(resource), id);
   SetImplementation(notification_surface_resource,
                     &notification_surface_implementation,
                     std::move(notification_surface));
 }
 
 const struct zwp_remote_shell_v1_interface remote_shell_implementation = {
     remote_shell_destroy, remote_shell_get_remote_surface,
     remote_shell_get_notification_surface};
 
-const uint32_t remote_shell_version = 8;
+const uint32_t remote_shell_version = 9;
 
 void bind_remote_shell(wl_client* client,
                        void* data,
                        uint32_t version,
                        uint32_t id) {
   wl_resource* resource =
       wl_resource_create(client, &zwp_remote_shell_v1_interface,
                          std::min(version, remote_shell_version), id);
 
   // TODO(reveman): Multi-display support.
@@ skipping 1144 matching lines @@
   DCHECK(event_loop);
   wl_event_loop_dispatch(event_loop, timeout.InMilliseconds());
 }
 
 void Server::Flush() {
   wl_display_flush_clients(wl_display_.get());
 }
 
 }  // namespace wayland
 }  // namespace exo