Move scoped_ole_initializer.h to ui/base/win and clean up ole initialization/uninitialization.

chrome/app/scoped_ole_initializer.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 CHROME_APP_SCOPED_OLE_INITIALIZER_H_
-#define CHROME_APP_SCOPED_OLE_INITIALIZER_H_
-#pragma once
-
-#include "base/logging.h"
-#include "build/build_config.h"
-
-// Wraps OLE initialization in a cross-platform class meant to be used on the
-// stack so init/uninit is done with scoping. This class is ok for use by
-// non-windows platforms; it just doesn't do anything.
-
-#if defined(OS_WIN)
-
-#include <ole2.h>
-
-class ScopedOleInitializer {
- public:
-  ScopedOleInitializer() {
-    int ole_result = OleInitialize(NULL);
-    DCHECK_EQ(S_OK, ole_result);
-  }
-  ~ScopedOleInitializer() {
-    OleUninitialize();
-  }
-};
-
-#else
-
-class ScopedOleInitializer {
- public:
-  // Empty, this class does nothing on non-win32 systems. Empty ctor is
-  // necessary to avoid "unused variable" warning on gcc.
-  ScopedOleInitializer() { }
-};
-
-#endif
-
-#endif  // CHROME_APP_SCOPED_OLE_INITIALIZER_H_