Expose v8::Function::IsBuiltin to public API.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4132 matching lines @@
 int Function::GetScriptColumnNumber() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
   if (func->shared()->script()->IsScript()) {
     i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
     return i::GetScriptColumnNumber(script, func->shared()->start_position());
   }
   return kLineOffsetNotFound;
 }
 
 
+bool Function::IsBuiltin() const {
+  i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
+  return func->IsBuiltin();
+}
+
+
 Handle<Value> Function::GetScriptId() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
   i::Isolate* isolate = func->GetIsolate();
   if (!func->shared()->script()->IsScript()) {
     return v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
   }
   i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
   return Utils::ToLocal(i::Handle<i::Object>(script->id(), isolate));
 }
 
@@ skipping 3382 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal