Add handling to respect role attribute in AXObjects.

Source/modules/accessibility/AXProgressIndicator.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 22 matching lines @@
 AXProgressIndicator::AXProgressIndicator(LayoutProgress* layoutObject, AXObjectCacheImpl* axObjectCache)
     : AXLayoutObject(layoutObject, axObjectCache)
 {
 }
 
 PassRefPtr<AXProgressIndicator> AXProgressIndicator::create(LayoutProgress* layoutObject, AXObjectCacheImpl* axObjectCache)
 {
     return adoptRef(new AXProgressIndicator(layoutObject, axObjectCache));
 }
 
+AccessibilityRole AXProgressIndicator::roleValue() const
+{
+    AccessibilityRole ariaRole = ariaRoleAttribute();
+    if (ariaRole != UnknownRole)
+        return ariaRole;
+    return ProgressIndicatorRole;
+}
+
 bool AXProgressIndicator::computeAccessibilityIsIgnored() const
 {
     return accessibilityIsIgnoredByDefault();
 }
 
 float AXProgressIndicator::valueForRange() const
 {
     if (hasAttribute(aria_valuenowAttr))
         return getAttribute(aria_valuenowAttr).toFloat();
 
@@ skipping 19 matching lines @@
     return 0.0f;
 }
 
 HTMLProgressElement* AXProgressIndicator::element() const
 {
     return toLayoutProgress(m_layoutObject)->progressElement();
 }
 
 
 } // namespace blink