diff --git a/include/gui/SurfaceControl.h b/include/gui/SurfaceControl.h
index 62217ad..2dcbfa7 100644
--- a/include/gui/SurfaceControl.h
+++ b/include/gui/SurfaceControl.h
@@ -82,7 +82,9 @@
 
     // Defers applying any changes made in this transaction until the Layer
     // identified by handle reaches the given frameNumber
-    status_t deferTransactionUntil(sp<IBinder> handle, uint64_t frameNumber);
+    status_t deferTransactionUntil(const sp<IBinder>& handle, uint64_t frameNumber);
+    // Reparents all children of this layer to the new parent handle.
+    status_t reparentChildren(const sp<IBinder>& newParentHandle);
 
     // Set an override scaling mode as documented in <system/window.h>
     // the override scaling mode will take precedence over any client