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..749eb4fd57bd58d382642ba5eb2c2066071ab025 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -764,7 +764,7 @@ class Isolate {
 
   // Find the correct handler for the current pending exception. This also
   // clears and returns the current pending exception.
-  Object* FindHandler();
+  Object* UnwindAndFindHandler();
 
   // Tries to predict whether an exception will be caught. Note that this can
   // only produce an estimate, because it is undecidable whether a finally
@@ -1254,6 +1254,10 @@ class Isolate {
   // then return true.
   bool PropagatePendingExceptionToExternalTryCatch();
 
+  // Remove per-frame stored materialized objects when we are unwinding
+  // the frame.
+  void RemoveMaterializedObjectsOnUnwind(StackFrame* frame);
+
   // Traverse prototype chain to find out whether the object is derived from
   // the Error object.
   bool IsErrorObject(Handle<Object> obj);