Split GuardField into GuardFieldType and GuardFieldLength instructions.

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, 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 "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
@@ skipping 3506 matching lines @@
     while (!iterate_cls.IsNull()) {
       ASSERT(iterate_cls.is_finalized());
       iterate_cls.set_is_fields_marked_nullable();
       fields = iterate_cls.fields();
       iterate_cls = iterate_cls.SuperClass();
       for (int field_num = 0; field_num < fields.Length(); field_num++) {
         field ^= fields.At(field_num);
         if (field.is_static()) {
           continue;
         }
-        field.UpdateGuardedCidAndLength(Object::null_object());
+        field.RecordStore(Object::null_object());
       }
     }
   }
 
   // Allocate an object for the given class.
   return Api::NewHandle(isolate, Instance::New(cls));
 }
 
 
 static Dart_Handle SetupArguments(Isolate* isolate,
@@ skipping 1543 matching lines @@
 
 
 DART_EXPORT void Dart_RegisterRootServiceRequestCallback(
     const char* name,
     Dart_ServiceRequestCallback callback,
     void* user_data) {
   Service::RegisterRootEmbedderCallback(name, callback, user_data);
 }
 
 }  // namespace dart