Make chrome/browser/chrome_browser_main_linux.* Linux-only.

chrome/browser/chrome_browser_main_extra_parts_gtk.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 // Contains functions used by BrowserMain() that are gtk-specific.
 
 #ifndef CHROME_BROWSER_CHROME_BROWSER_MAIN_EXTRA_PARTS_GTK_H_
 #define CHROME_BROWSER_CHROME_BROWSER_MAIN_EXTRA_PARTS_GTK_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/chrome_browser_main_extra_parts.h"
 
 class ChromeBrowserMainExtraPartsGtk : public ChromeBrowserMainExtraParts {
  public:
   ChromeBrowserMainExtraPartsGtk();
 
   virtual void PreEarlyInitialization() OVERRIDE;
 
   static void ShowMessageBox(const char* message);
 
  private:
   void DetectRunningAsRoot();
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainExtraPartsGtk);
 };
 
 #endif  // CHROME_BROWSER_CHROME_BROWSER_MAIN_EXTRA_PARTS_GTK_H_