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 cd60d5e4ae46fef936643a7bbbc716c21ce3537b..9d01332dfc3a114b112555128439b6ad7a8c2c79 100644
--- a/components/exo/wayland/server.cc
+++ b/components/exo/wayland/server.cc
@@ -1496,6 +1496,15 @@ 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,
@@ -1510,7 +1519,9 @@ 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:
@@ -1572,6 +1583,12 @@ class WaylandRemoteShell : public ash::ShellObserver,
 
   // Overridden from ash::ShellObserver:
   void OnDisplayWorkAreaInsetsChanged() override { SendConfigure(); }
+  void OnMaximizeModeStarted() override {
+    SendLayoutModeChange(ZWP_REMOTE_SHELL_V1_LAYOUT_MODE_TABLET);
+  }
+  void OnMaximizeModeEnded() override {
+    SendLayoutModeChange(ZWP_REMOTE_SHELL_V1_LAYOUT_MODE_WINDOWED);
+  }
 
   // Overridden from aura::client::ActivationChangeObserver:
   void OnWindowActivated(
@@ -1594,6 +1611,13 @@ class WaylandRemoteShell : public ash::ShellObserver,
     wl_client_flush(wl_resource_get_client(remote_shell_resource_));
   }
 
+  void SendLayoutModeChange(int mode) {
+    if (wl_resource_get_version(remote_shell_resource_) < 8)
+      return;
+    zwp_remote_shell_v1_send_layout_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;
@@ -1779,7 +1803,7 @@ 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 = 6;
+const uint32_t remote_shell_version = 8;
 
 void bind_remote_shell(wl_client* client,
                        void* data,