third_party: Update to version 8 of remote_shell_protocol

components/exo/wayland/server.cc

Index: components/exo/wayland/server.cc
diff --git a/components/exo/wayland/server.cc b/components/exo/wayland/server.cc
index d67da96ef1fbac542ffe2cfb0186d8e7dbf3bb0c..e73deeb3a3ee4c004bbf235a563bf84a2390508e 100644
--- a/components/exo/wayland/server.cc
+++ b/components/exo/wayland/server.cc
@@ -1497,6 +1497,15 @@ void remote_surface_set_top_inset(wl_client* client,
   GetUserDataAs<ShellSurface>(resource)->SetTopInset(height);
 }
 
+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);
+}
+
 const struct zwp_remote_surface_v1_interface remote_surface_implementation = {
     remote_surface_destroy,
     remote_surface_set_app_id,
@@ -1511,7 +1520,9 @@ const struct zwp_remote_surface_v1_interface remote_surface_implementation = {
     remote_surface_unfullscreen,
     remote_surface_set_rectangular_shadow,
     remote_surface_set_title,
-    remote_surface_set_top_inset};
+    remote_surface_set_top_inset,
+    remote_surface_set_system_modal,
+    remote_surface_unset_system_modal};
 
 ////////////////////////////////////////////////////////////////////////////////
 // notification_surface_interface:
@@ -1573,6 +1584,12 @@ class WaylandRemoteShell : public ash::ShellObserver,
 
   // Overridden from ash::ShellObserver:
   void OnDisplayWorkAreaInsetsChanged() override { SendConfigure(); }
+  void OnMaximizeModeStarted() override {
+    SendShellModeChange(ZWP_REMOTE_SHELL_V1_SHELL_MODE_TABLET);
+  }
+  void OnMaximizeModeEnded() override {
+    SendShellModeChange(ZWP_REMOTE_SHELL_V1_SHELL_MODE_WINDOWED);
+  }
 
   // Overridden from aura::client::ActivationChangeObserver:
   void OnWindowActivated(
@@ -1595,6 +1612,11 @@ class WaylandRemoteShell : public ash::ShellObserver,
     wl_client_flush(wl_resource_get_client(remote_shell_resource_));
   }
 
+  void SendShellModeChange(int mode) {
+    zwp_remote_shell_v1_send_shell_mode_changed(remote_shell_resource_, mode);
+    wl_client_flush(wl_resource_get_client(remote_shell_resource_));
+  }
+
   void SendActivated(aura::Window* gained_active, aura::Window* lost_active) {
     Surface* gained_active_surface =
         gained_active ? ShellSurface::GetMainSurface(gained_active) : nullptr;