AX Handle LI element regardless of style

BUG=141116

Review URL: https://codereview.chromium.org/657293002

git-svn-id: svn://svn.chromium.org/blink/trunk@183936 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/accessibility/AXRenderObject.cpp

@@ -272,7 +272,7 @@ AccessibilityRole AXRenderObject::determineAccessibilityRole()
             return ImageMapRole;
         return LinkRole;
     }
-    if (cssBox && cssBox->isListItem())
+    if ((cssBox && cssBox->isListItem()) || isHTMLLIElement(node))
         return ListItemRole;
     if (m_renderer->isListMarker())
         return ListMarkerRole;