Switch to using the message loop rather than gtk_main().

webkit/tools/test_shell/test_shell_main_gtk.cc

 // Copyright (c) 2006-2008 The Chromium 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 <gtk/gtk.h>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/icu_util.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
+#include "base/message_loop.h"
 #include "webkit/tools/test_shell/test_shell.h"
 #include "webkit/tools/test_shell/test_shell_switches.h"
 
 // TODO(port): This file is intended to match test_shell_main.cc.
 // Remerge this back into test_shell_main once we have enough supporting pieces
 // in place.
 
 int main(int argc, char* argv[]) {
   // Make Singletons work.
   base::AtExitManager at_exit_manager;
@@ skipping 23 matching lines @@
     file_util::AppendToPath(&uri, L"test_shell");
     file_util::AppendToPath(&uri, L"index.html");
   }
 
   if (parsed_command_line.GetLooseValueCount() > 0) {
     CommandLine::LooseValueIterator iter =
         parsed_command_line.GetLooseValuesBegin();
     uri = *iter;
   }
 
+  MessageLoopForUI main_message_loop;
+
   TestShell* shell;
   if (TestShell::CreateNewWindow(uri, &shell)) {
     // TODO(port): the rest of this.  :)
   }
 
-  // TODO(port): use MessageLoop instead.
-  gtk_main();
+  main_message_loop.Run();
 
   return 0;
 }