Cancel layer update when a layer is about to be destroyed
Bug #9310706

Change-Id: I73eea6314c326f15a979617e3a05b525935f0d3f
diff --git a/libs/hwui/Layer.h b/libs/hwui/Layer.h
index 326b25a..ebd5543 100644
--- a/libs/hwui/Layer.h
+++ b/libs/hwui/Layer.h
@@ -245,6 +245,7 @@
     }
 
     void defer();
+    void cancelDefer();
     void flush();
     void render();