To allow a client to create a subsurface with parent resource_id
which is created in other process.
Change-Id: Iaa3e661f977a4da1897c49e288aeeacb59521753
<arg name="subsurface" type="object" interface="wl_subsurface"/>
</request>
+ <request name="get_subsurface">
+ <arg name="id" type="new_id" interface="wl_subsurface" />
+ <arg name="surface" type="object" interface="wl_surface" />
+ <arg name="parent_id" type="uint" />
+ </request>
+
<!-- for opaque_state -->
<request name="set_opaque_state">
<arg name="surface" type="object" interface="wl_surface" />