Add ChromeBrowserMainExtraParts for non main parts.

chrome/browser/chrome_browser_main_extra_parts_gtk.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.
+
+// 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();
+};
+
+#endif  // CHROME_BROWSER_CHROME_BROWSER_MAIN_EXTRA_PARTS_GTK_H_