Make ClassFinalizer indifferent on whether we are generating a snapshot or not.

runtime/vm/snapshot.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/snapshot.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
 #include "vm/exceptions.h"
@@ skipping 516 matching lines @@
   ALLOC_NEW_OBJECT(LiteralToken, Object::literal_token_class());
 }
 
 
 RawGrowableObjectArray* SnapshotReader::NewGrowableObjectArray() {
   ALLOC_NEW_OBJECT(GrowableObjectArray,
                    object_store()->growable_object_array_class());
 }
 
 
+RawApiError* SnapshotReader::NewApiError() {
+  ALLOC_NEW_OBJECT(ApiError, Object::api_error_class());
+}
+
+
+RawLanguageError* SnapshotReader::NewLanguageError() {
+  ALLOC_NEW_OBJECT(LanguageError, Object::language_error_class());
+}
+
+
 RawClass* SnapshotReader::LookupInternalClass(intptr_t class_header) {
   // If the header is an object Id, lookup singleton VM classes or classes
   // stored in the object store.
   if (IsVMIsolateObject(class_header)) {
     intptr_t class_id = GetVMIsolateObjectId(class_header);
     if (IsSingletonClassId(class_id)) {
       return isolate()->class_table()->At(class_id);  // get singleton class.
     }
   } else if (SerializedHeaderTag::decode(class_header) == kObjectId) {
     intptr_t class_id = SerializedHeaderData::decode(class_header);
@@ skipping 574 matching lines @@
     RawObject* raw_obj = *current;
     if (as_references_) {
       writer_->WriteObjectRef(raw_obj);
     } else {
       writer_->WriteObjectImpl(raw_obj);
     }
   }
 }
 
 }  // namespace dart