Re-landing of "replace TrySync with Metadata".

runtime/vm/heap.cc

Index: runtime/vm/heap.cc
diff --git a/runtime/vm/heap.cc b/runtime/vm/heap.cc
index d75ad9d35de51554a76f8a3e57345c000f18ffd3..15bc62fc5aebb01d5c12e48866ac98c86ffb1b37 100644
--- a/runtime/vm/heap.cc
+++ b/runtime/vm/heap.cc
@@ -405,6 +405,7 @@ void Heap::CollectOldSpaceGarbage(Thread* thread,
     NOT_IN_PRODUCT(PrintStatsToTimeline(&tds));
     // Some Code objects may have been collected so invalidate handler cache.
     thread->isolate()->handler_info_cache()->Clear();
+    thread->isolate()->catch_entry_state_cache()->Clear();
     EndOldSpaceGC();
   }
 }