Clean up native context slots and add new ones.

src/factory.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 1232 matching lines @@
                           &exception)
            .ToHandle(&result)) {
     Handle<Object> exception_obj;
     if (exception.ToHandle(&exception_obj)) return exception_obj;
     return undefined_value();
   }
   return result;
 }
 
 
-Handle<Object> Factory::NewError(const char* constructor,
+Handle<Object> Factory::NewError(Handle<JSFunction> constructor,
                                  Handle<String> message) {
-  Handle<String> constr = InternalizeUtf8String(constructor);
-  Handle<JSFunction> fun = Handle<JSFunction>::cast(Object::GetProperty(
-      isolate()->js_builtins_object(), constr).ToHandleChecked());
   Handle<Object> argv[] = { message };
 
   // Invoke the JavaScript factory method. If an exception is thrown while
   // running the factory method, use the exception as the result.
   Handle<Object> result;
   MaybeHandle<Object> exception;
-  if (!Execution::TryCall(fun, undefined_value(), arraysize(argv), argv,
+  if (!Execution::TryCall(constructor, undefined_value(), arraysize(argv), argv,
                           &exception)
            .ToHandle(&result)) {
     Handle<Object> exception_obj;
     if (exception.ToHandle(&exception_obj)) return exception_obj;
     return undefined_value();
   }
   return result;
 }
 
 
@@ skipping 1193 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8