Fixed non-speaking Sign out buttons.

ash/system/user/tray_user.cc

 // 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.
 
 #include "ash/system/user/tray_user.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_item_view.h"
@@ skipping 111 matching lines @@
     // A user should not be able to modify logged in state when screen is
     // locked.
     if (!locked)
       AddButtonContainer();
   }
 
   virtual ~UserView() {}
 
   // Create container for buttons.
   void AddButtonContainer() {
-    TrayPopupLabelButton* button = new TrayPopupLabelButton(this,
-        ash::user::GetLocalizedSignOutStringForStatus(login_, true));
+    const string16 title = ash::user::GetLocalizedSignOutStringForStatus(login_,
+                                                                         true);
+    TrayPopupLabelButton* button = new TrayPopupLabelButton(this, title);
+    button->SetAccessibleName(title);
     AddChildView(button);
     signout_ = button;
   }
 
  private:
   void AddUserInfo() {
     user_info_ = new views::View;
     user_info_->SetLayoutManager(new views::BoxLayout(
         views::BoxLayout::kHorizontal, kTrayPopupPaddingHorizontal,
         kUserInfoVerticalPadding, kTrayPopupPaddingBetweenItems));
@@ skipping 197 matching lines @@
   // Check for null to avoid crbug.com/150944.
   if (avatar_) {
     avatar_->SetImage(
         ash::Shell::GetInstance()->tray_delegate()->GetUserImage(),
         gfx::Size(kUserIconSize, kUserIconSize));
   }
 }
 
 }  // namespace internal
 }  // namespace ash