Refactor MainHook into TestSuite.

chrome/test/base/run_all_unittests.cc

Index: chrome/test/base/run_all_unittests.cc
diff --git a/chrome/test/base/run_all_unittests.cc b/chrome/test/base/run_all_unittests.cc
index 671ddc2552699d164fafb1a42718a8fb7b5c0cfb..0cd1fa5d05dc462ad75d954e4d2588ab5f744622 100644
--- a/chrome/test/base/run_all_unittests.cc
+++ b/chrome/test/base/run_all_unittests.cc
@@ -2,11 +2,9 @@
 // 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 "chrome/test/base/chrome_test_suite.h"
 #include "content/public/test/unittest_test_suite.h"
 
 int main(int argc, char **argv) {
-  MainHook hook(main, argc, argv);
   return content::UnitTestTestSuite(new ChromeTestSuite(argc, argv)).Run();
 }