Remove materialized objects on stack unwind.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 37d832d25d36783d2db482f1aff22407a041b622..af3c7723639ed6048cdaf58784746626f2bac67c 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -766,6 +766,10 @@ class Isolate {
   // clears and returns the current pending exception.
   Object* FindHandler();
 
+  // Remove per-frame stored materialized objects when we are unwinding
+  // the frame.
+  void RemoveMaterializedObjectsOnUnwind(StackFrame* frame);
+
   // Tries to predict whether an exception will be caught. Note that this can
   // only produce an estimate, because it is undecidable whether a finally
   // clause will consume or re-throw an exception. We conservatively assume any