Add a button on status bar to indicate that accessibility is enabled.

chrome/browser/chromeos/status/accessibility_menu_button.h

Index: chrome/browser/chromeos/status/accessibility_menu_button.h
diff --git a/chrome/browser/chromeos/status/accessibility_menu_button.h b/chrome/browser/chromeos/status/accessibility_menu_button.h
new file mode 100644
index 0000000000000000000000000000000000000000..80a842a6271e8da63b17b099ee2bd25e86e379a0
--- /dev/null
+++ b/chrome/browser/chromeos/status/accessibility_menu_button.h
@@ -0,0 +1,45 @@
+// Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_STATUS_ACCESSIBILITY_MENU_BUTTON_H_
+#define CHROME_BROWSER_CHROMEOS_STATUS_ACCESSIBILITY_MENU_BUTTON_H_
+#pragma once
+
+#include "chrome/browser/chromeos/status/status_area_button.h"
+#include "chrome/browser/prefs/pref_member.h"
+#include "content/common/notification_observer.h"
+#include "views/controls/menu/view_menu_delegate.h"
+
+namespace chromeos {
+
+class StatusAreaHost;
+
+// A class for the button in the status area which alerts the user when
+// accessibility features are enabled.
+class AccessibilityMenuButton : public NotificationObserver,
+                                public StatusAreaButton,
+                                public views::ViewMenuDelegate {
+ public:
+  explicit AccessibilityMenuButton(StatusAreaHost* host);
+  virtual ~AccessibilityMenuButton();
+
+  // views::ViewMenuDelegate implementation.
+  virtual void RunMenu(views::View* unused_source, const gfx::Point& pt);

[Zachary Kuznia, 2011/08/29 04:09:48]

Add the OVERRIDE marker here.

[hashimoto, 2011/08/29 08:22:48]

Fixed.

+
+  // NotificationObserver implementation
+  virtual void Observe(int type,

[Zachary Kuznia, 2011/08/29 04:09:48]

Add the OVERRIDE marker here.

[hashimoto, 2011/08/29 08:22:48]

Fixed.

+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+  // Updates the tooltip text and the accessible name.
+  void UpdateTooltip();

[Zachary Kuznia, 2011/08/29 04:09:48]

This should probably be private.

[hashimoto, 2011/08/29 08:22:48]

Good point, thanks.

+
+ private:
+  BooleanPrefMember accessibility_enabled_;

[Zachary Kuznia, 2011/08/29 04:09:48]

nit:  I think there should be a blank line here.

[hashimoto, 2011/08/29 08:22:48]

Fixed.

+  DISALLOW_COPY_AND_ASSIGN(AccessibilityMenuButton);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_STATUS_ACCESSIBILITY_MENU_BUTTON_H_