RemoveAccessibilityObserver   78 ash/system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc         RemoveAccessibilityObserver(this);
RemoveAccessibilityObserver   48 ash/system/tray/system_tray_notifier.h   void RemoveAccessibilityObserver(AccessibilityObserver* observer);
RemoveAccessibilityObserver  328 ash/system/tray_accessibility.cc       RemoveAccessibilityObserver(this);