Refactor MainHook into TestSuite.

media/base/run_all_unittests.cc

 // 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"
 #include "media/base/media.h"
 
 class TestSuiteNoAtExit : public base::TestSuite {
  public:
   TestSuiteNoAtExit(int argc, char** argv) : TestSuite(argc, argv) {}
   virtual ~TestSuiteNoAtExit() {}
  protected:
   virtual void Initialize() OVERRIDE;
 };
 
 void TestSuiteNoAtExit::Initialize() {
   // Run TestSuite::Initialize first so that logging is initialized.
   base::TestSuite::Initialize();
   // Run this here instead of main() to ensure an AtExitManager is already
   // present.
   media::InitializeMediaLibraryForTesting();
 }
 
 int main(int argc, char** argv) {
-  MainHook hook(main, argc, argv);
   return TestSuiteNoAtExit(argc, argv).Run();
 }