Make it possible to run gtests on iOS.

base/test/run_all_unittests.cc

Index: base/test/run_all_unittests.cc
diff --git a/base/test/run_all_unittests.cc b/base/test/run_all_unittests.cc
index 8bfeb3bbb11d44b4d5e526f3384751fb7b614011..969b09164a448748188871fffb684a98791dc74d 100644
--- a/base/test/run_all_unittests.cc
+++ b/base/test/run_all_unittests.cc
@@ -1,9 +1,11 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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 "base/test/main_hook.h"
 #include "base/test/test_suite.h"
 
 int main(int argc, char** argv) {
+  MainHook hook(main, argc, argv);
   return base::TestSuite(argc, argv).Run();
 }