chromeos: Add operations to monitor the screen orientation.

chrome/browser/chromeos/chrome_browser_main_chromeos.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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_CHROMEOS_CHROME_BROWSER_MAIN_CHROMEOS_H_
 #define CHROME_BROWSER_CHROMEOS_CHROME_BROWSER_MAIN_CHROMEOS_H_
 
+#include "base/memory/ref_counted.h"
 #include "chrome/browser/chrome_browser_main_gtk.h"
 
+namespace sensors {
+class SensorsSourceChromeos;
+}  // namespace sensors
+
 class ChromeBrowserMainPartsChromeos : public ChromeBrowserMainPartsGtk {
  public:
   explicit ChromeBrowserMainPartsChromeos(const MainFunctionParams& parameters);
 
   virtual ~ChromeBrowserMainPartsChromeos();
 
   virtual void PreEarlyInitialization() OVERRIDE;
   virtual void PreMainMessageLoopStart() OVERRIDE;
   virtual void PostMainMessageLoopStart() OVERRIDE;
 
  private:
+  scoped_refptr<sensors::SensorsSourceChromeos> sensors_source_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainPartsChromeos);
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_CHROME_BROWSER_MAIN_CHROMEOS_H_