Show a notification when a braille display is connected.

ash/system/tray_accessibility.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_SYSTEM_TRAY_ACCESSIBILITY_H_
 #define ASH_SYSTEM_TRAY_ACCESSIBILITY_H_
 
 #include "ash/accessibility_delegate.h"
 #include "ash/shell_observer.h"
 #include "ash/system/tray/tray_details_view.h"
 #include "ash/system/tray/tray_image_item.h"
+#include "ash/system/tray/tray_notification_view.h"
 #include "ash/system/tray/view_click_listener.h"
 #include "base/gtest_prod_util.h"
 #include "ui/gfx/font.h"
 #include "ui/views/controls/button/button.h"
 
 namespace chromeos {
 class TrayAccessibilityTest;
 }
 
 namespace views {
 class Button;
 class ImageView;
+class Label;
 class View;
 }
 
 namespace ash {
 
 class SystemTrayItem;
 
 class ASH_EXPORT AccessibilityObserver {
  public:
   virtual ~AccessibilityObserver() {}
 
   // Notifies when accessibilty mode changes.
   virtual void OnAccessibilityModeChanged(
       AccessibilityNotificationVisibility notify) = 0;
 };
 
 namespace internal {
 
 class HoverHighlightView;
 
 namespace tray {
 
-class AccessibilityPopupView;
+class AccessibilityPopupView : public TrayNotificationView {

[dmazzoni, 2014/03/26 19:02:46]

You moved this to the header file because you need to access it from
tray_accessibility_browsertest.cc, right?

+ public:
+  AccessibilityPopupView(SystemTrayItem* owner, uint32 enabled_state_bits);
+
+  const views::Label* GetLabelForTest() const { return label_; }
+
+ private:
+  views::Label* CreateLabel(uint32 enabled_state_bits);
+
+  views::Label* label_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccessibilityPopupView);
+};
 
 class AccessibilityDetailedView : public TrayDetailsView,
                                   public ViewClickListener,
                                   public views::ButtonListener,
                                   public ShellObserver {
  public:
   explicit AccessibilityDetailedView(SystemTrayItem* owner,
                                      user::LoginStatus login);
   virtual ~AccessibilityDetailedView() {}
 
@@ skipping 55 matching lines @@
   virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
 
   // Overridden from AccessibilityObserver.
   virtual void OnAccessibilityModeChanged(
       AccessibilityNotificationVisibility notify) OVERRIDE;
 
   views::View* default_;
   tray::AccessibilityPopupView* detailed_popup_;
   tray::AccessibilityDetailedView* detailed_menu_;
 
-  bool request_popup_view_;
+  // Bitmap of fvalues from AccessibilityState.  Can contain any or
+  // both of A11Y_SPOKEN_FEEDBACK A11Y_BRAILLE_DISPLAY_CONNECTED.
+  uint32 request_popup_view_state_;
+
   bool tray_icon_visible_;
   user::LoginStatus login_;
 
   // Bitmap of values from AccessibilityState enum.
   uint32 previous_accessibility_state_;
 
   // A11y feature status on just entering the lock screen.
   bool show_a11y_menu_on_lock_screen_;
 
   friend class chromeos::TrayAccessibilityTest;
   DISALLOW_COPY_AND_ASSIGN(TrayAccessibility);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_ACCESSIBILITY_H_