Make GTK and Aura parts orthogonal to OS parts

chrome/browser/chrome_browser_parts_aura.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_CHROME_BROWSER_PARTS_AURA_H_
+#define CHROME_BROWSER_CHROME_BROWSER_PARTS_AURA_H_
+
+#include "content/browser/browser_main.h"
+
+class ChromeBrowserPartsAura : public content::BrowserParts {
+ public:
+  ChromeBrowserPartsAura();
+
+  virtual void PreEarlyInitialization() OVERRIDE;
+  virtual void PostMainMessageLoopStart() OVERRIDE;
+
+  static void ShowMessageBox(const char* message);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ChromeBrowserPartsAura);
+};
+
+#endif  // CHROME_BROWSER_CHROME_BROWSER_PARTS_AURA_H_