third_party: Update remote shell protocol to version 2

third_party/wayland-protocols/include/protocol/remote-shell-unstable-v1-server-protocol.h

Index: third_party/wayland-protocols/include/protocol/remote-shell-unstable-v1-server-protocol.h
diff --git a/third_party/wayland-protocols/include/protocol/remote-shell-unstable-v1-server-protocol.h b/third_party/wayland-protocols/include/protocol/remote-shell-unstable-v1-server-protocol.h
index 67075749d39a18bf125e0ec382f3f4ee4107b40a..d22d969c74df250f636f2dfeb595b85ee82a6865 100644
--- a/third_party/wayland-protocols/include/protocol/remote-shell-unstable-v1-server-protocol.h
+++ b/third_party/wayland-protocols/include/protocol/remote-shell-unstable-v1-server-protocol.h
@@ -599,6 +599,28 @@ struct zwp_remote_surface_v1_interface {
 	void (*pin_with_trusted_flag)(struct wl_client *client,
 				      struct wl_resource *resource,
 				      int32_t trusted);
+	/**
+	 * start client-driven drag
+	 *
+	 * Notifies the compositor when a client-driven drag of the
+	 * surface starts. The compositor may assume that subsequent
+	 * set_window_geometry requests are position updates until it
+	 * receives a "drop" request.
+	 * @since 12
+	 */
+	void (*drag)(struct wl_client *client,
+		     struct wl_resource *resource);
+	/**
+	 * stop client-driven drag
+	 *
+	 * Notifies the compositor when a client-driven drag of the
+	 * surface stops, and whether it was reverted. The compositor may
+	 * choose to stop the drag regardless of this request.
+	 * @since 12
+	 */
+	void (*drop)(struct wl_client *client,
+		     struct wl_resource *resource,
+		     uint32_t revert);
 };
 
 #define ZWP_REMOTE_SURFACE_V1_SET_FULLSCREEN	0