Activate the status area only when it's focused using the keyboard

ash/shell.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_SHELL_H_
 #define ASH_SHELL_H_
 #pragma once
 
 #include <utility>
 #include <vector>
@@ skipping 174 matching lines @@
   }
   PowerButtonController* power_button_controller() {
     return power_button_controller_.get();
   }
   VideoDetector* video_detector() {
     return video_detector_.get();
   }
   WindowCycleController* window_cycle_controller() {
     return window_cycle_controller_.get();
   }
+  internal::FocusCycler* focus_cycler() {
+    return focus_cycler_.get();
+  }
   AudioController* audio_controller() const {
     return audio_controller_;
   }
   BrightnessController* brightness_controller() const {
     return brightness_controller_;
   }
   PowerStatusController* power_status_controller() const {
     return power_status_controller_;
   }
 
@@ skipping 120 matching lines @@
   // Offset between the corner of the status area and the corner of the screen
   // when in the compact window mode.
   gfx::Size compact_status_area_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_