Add support for X11 workspaces

components/sessions/core/session_service_commands.h

Index: components/sessions/core/session_service_commands.h
diff --git a/components/sessions/core/session_service_commands.h b/components/sessions/core/session_service_commands.h
index 9aa22a75df0b4436cb9c9f1fb62500fc0abaea4e..03b3ce626ba662e6560946730e68e91dc97c4dbb 100644
--- a/components/sessions/core/session_service_commands.h
+++ b/components/sessions/core/session_service_commands.h
@@ -76,6 +76,10 @@ SESSIONS_EXPORT std::unique_ptr<SessionCommand> CreateLastActiveTimeCommand(
     const SessionID& tab_id,
     base::TimeTicks last_active_time);
 
+SESSIONS_EXPORT std::unique_ptr<SessionCommand> CreateSetWindowWorkspaceCommand(
+    const SessionID& window_id,
+    int workspace_id);
+
 // Searches for a pending command using |base_session_service| that can be
 // replaced with |command|. If one is found, pending command is removed, the
 // command is added to the pending commands (taken ownership) and true is