Change exception type to Object.

src/messages.cc

 // Copyright 2011 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 89 matching lines @@
 void MessageHandler::ReportMessage(Isolate* isolate,
                                    MessageLocation* loc,
                                    Handle<Object> message) {
   // We are calling into embedder's code which can throw exceptions.
   // Thus we need to save current exception state, reset it to the clean one
   // and ignore scheduled exceptions callbacks can throw.
 
   // We pass the exception object into the message handler callback though.
   Object* exception_object = isolate->heap()->undefined_value();
   if (isolate->has_pending_exception()) {
-    isolate->pending_exception()->ToObject(&exception_object);
+    exception_object = isolate->pending_exception();
   }
   Handle<Object> exception_handle(exception_object, isolate);
 
   Isolate::ExceptionScope exception_scope(isolate);
   isolate->clear_pending_exception();
   isolate->set_external_caught_exception(false);
 
   v8::Local<v8::Message> api_message_obj = v8::Utils::MessageToLocal(message);
   v8::Local<v8::Value> api_exception_obj = v8::Utils::ToLocal(exception_handle);
 
@@ skipping 66 matching lines @@
 
 SmartArrayPointer<char> MessageHandler::GetLocalizedMessage(
     Isolate* isolate,
     Handle<Object> data) {
   HandleScope scope(isolate);
   return GetMessage(isolate, data)->ToCString(DISALLOW_NULLS);
 }
 
 
 } }  // namespace v8::internal