Add more files to content_unittests.

content/test/content_test_suite.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_TEST_CONTENT_TEST_SUITE_H_
 #define CONTENT_TEST_CONTENT_TEST_SUITE_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "base/test/test_suite.h"
+#include "base/win/scoped_com_initializer.h"
 
 class ContentTestSuite : public base::TestSuite {
  public:
   ContentTestSuite(int argc, char** argv);
   virtual ~ContentTestSuite();
 
  protected:
   virtual void Initialize() OVERRIDE;
 
+ private:
+  base::win::ScopedCOMInitializer com_initializer_;
+
   DISALLOW_COPY_AND_ASSIGN(ContentTestSuite);
 };
 
 #endif  // CONTENT_TEST_CONTENT_TEST_SUITE_H_