Implements determineAccessibilityRole() instead of roleValue()

Source/modules/accessibility/AXSlider.cpp

Index: Source/modules/accessibility/AXSlider.cpp
diff --git a/Source/modules/accessibility/AXSlider.cpp b/Source/modules/accessibility/AXSlider.cpp
index e1791afaf054d309225ac1cac3a27c6af0b0cd3a..93e204d5dead56eb6851f352f56db426aa93c36a 100644
--- a/Source/modules/accessibility/AXSlider.cpp
+++ b/Source/modules/accessibility/AXSlider.cpp
@@ -49,11 +49,11 @@ PassRefPtr<AXSlider> AXSlider::create(LayoutObject* layoutObject, AXObjectCacheI
     return adoptRef(new AXSlider(layoutObject, axObjectCache));
 }
 
-AccessibilityRole AXSlider::roleValue() const
+AccessibilityRole AXSlider::determineAccessibilityRole()
 {
-    AccessibilityRole ariaRole = ariaRoleAttribute();
-    if (ariaRole != UnknownRole)
-        return ariaRole;
+    if ((m_ariaRole = determineAriaRoleAttribute()) != UnknownRole)
+        return m_ariaRole;
+
     return SliderRole;
 }