Moved a bunch of win-specific files to the new win folder in chrome/browser

chrome/browser/browser_util_win.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_BROWSER_BROWSER_UTIL_WIN_H_
-#define CHROME_BROWSER_BROWSER_UTIL_WIN_H_
-
-namespace browser_util {
-
-// Check if current chrome.exe is already running as a browser process by trying
-// to create a Global event with name same as full path of chrome.exe. This
-// method caches the handle to this event so on subsequent calls also it can
-// first close the handle and check for any other process holding the handle to
-// the event.
-bool IsBrowserAlreadyRunning();
-
-}  // namespace browser_util
-
-#endif  // CHROME_BROWSER_BROWSER_UTIL_WIN_H_