chromeos: Move files in //ash/common to //ash, part 3

ash/high_contrast/high_contrast_controller.h

 // 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.
 
 #ifndef ASH_HIGH_CONTRAST_HIGH_CONTRAST_CONTROLLER_H_
 #define ASH_HIGH_CONTRAST_HIGH_CONTRAST_CONTROLLER_H_
 
 #include "ash/ash_export.h"
-#include "ash/common/shell_observer.h"
+#include "ash/shell_observer.h"
 #include "base/macros.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ash {
 
 class ASH_EXPORT HighContrastController : public ShellObserver {
  public:
@@ skipping 12 matching lines @@
 
   // Indicates if the high contrast mode is enabled or disabled.
   bool enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(HighContrastController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_HIGH_CONTRAST_HIGH_CONTRAST_CONTROLLER_H_