Update V8 to r4730 as required by WebKit r60469
diff --git a/src/handles.h b/src/handles.h
index ea13def..96b17a6 100644
--- a/src/handles.h
+++ b/src/handles.h
@@ -262,6 +262,8 @@
 
 Handle<JSObject> Copy(Handle<JSObject> obj);
 
+Handle<Object> SetAccessor(Handle<JSObject> obj, Handle<AccessorInfo> info);
+
 Handle<FixedArray> AddKeysFromJSArray(Handle<FixedArray>,
                                       Handle<JSArray> array);