Make views Slider accessible on Chrome OS

ui/views/accessibility/native_view_accessibility_win.cc

 // 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.
 
 #include "ui/views/accessibility/native_view_accessibility_win.h"
 
 #include <atlbase.h>
 #include <atlcom.h>
 
 #include <vector>
@@ skipping 812 matching lines @@
     default:
       // Not supported or invalid event.
       NOTREACHED();
       return -1;
   }
 }
 
 int32 NativeViewAccessibilityWin::MSAARole(AccessibilityTypes::Role role) {
   switch (role) {
     case AccessibilityTypes::ROLE_ALERT:
-return ROLE_SYSTEM_ALERT;
+      return ROLE_SYSTEM_ALERT;
     case AccessibilityTypes::ROLE_APPLICATION:
       return ROLE_SYSTEM_APPLICATION;
     case AccessibilityTypes::ROLE_BUTTONDROPDOWN:
       return ROLE_SYSTEM_BUTTONDROPDOWN;
     case AccessibilityTypes::ROLE_BUTTONMENU:
       return ROLE_SYSTEM_BUTTONMENU;
     case AccessibilityTypes::ROLE_CHECKBUTTON:
       return ROLE_SYSTEM_CHECKBUTTON;
     case AccessibilityTypes::ROLE_COMBOBOX:
       return ROLE_SYSTEM_COMBOBOX;
@@ skipping 26 matching lines @@
     case AccessibilityTypes::ROLE_PROGRESSBAR:
       return ROLE_SYSTEM_PROGRESSBAR;
     case AccessibilityTypes::ROLE_PUSHBUTTON:
       return ROLE_SYSTEM_PUSHBUTTON;
     case AccessibilityTypes::ROLE_RADIOBUTTON:
       return ROLE_SYSTEM_RADIOBUTTON;
     case AccessibilityTypes::ROLE_SCROLLBAR:
       return ROLE_SYSTEM_SCROLLBAR;
     case AccessibilityTypes::ROLE_SEPARATOR:
       return ROLE_SYSTEM_SEPARATOR;
+    case AccessibilityTypes::ROLE_SLIDER:
+      return ROLE_SYSTEM_SLIDER;
     case AccessibilityTypes::ROLE_STATICTEXT:
       return ROLE_SYSTEM_STATICTEXT;
     case AccessibilityTypes::ROLE_TEXT:
       return ROLE_SYSTEM_TEXT;
     case AccessibilityTypes::ROLE_TITLEBAR:
       return ROLE_SYSTEM_TITLEBAR;
     case AccessibilityTypes::ROLE_TOOLBAR:
       return ROLE_SYSTEM_TOOLBAR;
     case AccessibilityTypes::ROLE_WINDOW:
       return ROLE_SYSTEM_WINDOW;
@@ skipping 135 matching lines @@
     const string16& text,
     IA2TextBoundaryType ia2_boundary,
     LONG start_offset,
     ui::TextBoundaryDirection direction) {
   HandleSpecialTextOffset(text, &start_offset);
   ui::TextBoundaryType boundary = IA2TextBoundaryToTextBoundary(ia2_boundary);
   std::vector<int32> line_breaks;
   return ui::FindAccessibleTextBoundary(
       text, line_breaks, boundary, start_offset, direction);
 }