Add exception handler cache to isolate

runtime/vm/clustered_snapshot.cc

Index: runtime/vm/clustered_snapshot.cc
diff --git a/runtime/vm/clustered_snapshot.cc b/runtime/vm/clustered_snapshot.cc
index 162df5aba3a525e12cbdd3af297aad8795c69983..ea87c49587eb14538e6f998a9cc57475e2589a0d 100644
--- a/runtime/vm/clustered_snapshot.cc
+++ b/runtime/vm/clustered_snapshot.cc
@@ -1982,8 +1982,7 @@ class ExceptionHandlersSerializationCluster : public SerializationCluster {
       s->WriteRef(handlers->ptr()->handled_types_data_);
 
       uint8_t* data = reinterpret_cast<uint8_t*>(handlers->ptr()->data());
-      intptr_t length_in_bytes =
-          length * sizeof(RawExceptionHandlers::HandlerInfo);
+      intptr_t length_in_bytes = length * sizeof(HandlerInfo);
       s->WriteBytes(data, length_in_bytes);
     }
   }
@@ -2026,8 +2025,7 @@ class ExceptionHandlersDeserializationCluster : public DeserializationCluster {
           reinterpret_cast<RawArray*>(d->ReadRef());
 
       uint8_t* data = reinterpret_cast<uint8_t*>(handlers->ptr()->data());
-      intptr_t length_in_bytes =
-          length * sizeof(RawExceptionHandlers::HandlerInfo);
+      intptr_t length_in_bytes = length * sizeof(HandlerInfo);
       d->ReadBytes(data, length_in_bytes);
     }
   }