Make GTK and Aura parts orthogonal to OS parts

chrome/browser/chrome_browser_main_linux.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 linux-specific.
+
+#ifndef CHROME_BROWSER_CHROME_BROWSER_MAIN_LINUX_H_
+#define CHROME_BROWSER_CHROME_BROWSER_MAIN_LINUX_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "chrome/browser/chrome_browser_main_posix.h"
+
+class ChromeBrowserMainPartsLinux : public ChromeBrowserMainPartsPosix {
+ public:
+  explicit ChromeBrowserMainPartsLinux(const MainFunctionParams& parameters);
+
+  // ChromeBrowserMainParts overrides.
+  virtual void ShowMissingLocaleMessageBox() OVERRIDE;
+};
+
+#endif  // CHROME_BROWSER_CHROME_BROWSER_MAIN_LINUX_H_