Add accessibility related notification to notification center

ash/system/tray_accessibility.h

Index: ash/system/tray_accessibility.h
diff --git a/ash/system/tray_accessibility.h b/ash/system/tray_accessibility.h
index 2e101f9d5b6d7d6b604e64cda38a90be4aaf45f8..1025b58aa7d7d45168484a23ad565b7d904b9826 100644
--- a/ash/system/tray_accessibility.h
+++ b/ash/system/tray_accessibility.h
@@ -23,7 +23,6 @@ class TrayAccessibilityTest;
 namespace views {
 class Button;
 class CustomButton;
-class Label;
 class View;
 }
 
@@ -32,27 +31,6 @@ class SystemTrayItem;
 
 namespace tray {
 
-// A view for closable notification views, laid out like:
-//  -------------------
-// | icon  contents  x |
-//  ----------------v--
-// The close button will call OnClose() when clicked.
-class AccessibilityPopupView : public views::View {
- public:
-  explicit AccessibilityPopupView(uint32_t enabled_state_bits);
-
-  const views::Label* label_for_test() const { return label_; }
-
-  void Init();
-
- private:
-  views::Label* CreateLabel(uint32_t enabled_state_bits);
-
-  views::Label* label_;
-
-  DISALLOW_COPY_AND_ASSIGN(AccessibilityPopupView);
-};
-
 // Create the detailed view of accessibility tray.
 class AccessibilityDetailedView : public TrayDetailsView {
  public:
@@ -132,13 +110,8 @@ class TrayAccessibility : public TrayImageItem, public AccessibilityObserver {
       AccessibilityNotificationVisibility notify) override;
 
   views::View* default_;
-  tray::AccessibilityPopupView* detailed_popup_;
   tray::AccessibilityDetailedView* detailed_menu_;
 
-  // Bitmap of fvalues from AccessibilityState.  Can contain any or
-  // both of A11Y_SPOKEN_FEEDBACK A11Y_BRAILLE_DISPLAY_CONNECTED.
-  uint32_t request_popup_view_state_;
-
   bool tray_icon_visible_;
   LoginStatus login_;