Implement nameFromLabelElement to see if a control is associated with a label.

third_party/WebKit/Source/modules/accessibility/AXNodeObject.h

 /*
  * Copyright (C) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 143 matching lines @@
     // ARIA attributes.
     String ariaDescribedByAttribute() const final;
     String ariaLabelledbyAttribute() const final;
     AccessibilityRole ariaRoleAttribute() const final;
 
     // AX name calculation.
     String textAlternative(bool recursive, bool inAriaLabelledByTraversal, AXObjectSet& visited, AXNameFrom&, AXRelatedObjectVector*, NameSources*) const override;
     String description(AXNameFrom, AXDescriptionFrom&, AXObjectVector* descriptionObjects) const override;
     String description(AXNameFrom, AXDescriptionFrom&, DescriptionSources*, AXRelatedObjectVector*) const override;
     String placeholder(AXNameFrom, AXDescriptionFrom) const override;
+    bool nameFromLabelElement() const override;
 
     // Location and click point in frame-relative coordinates.
     LayoutRect elementRect() const override;
 
     // High-level accessibility tree access.
     AXObject* computeParent() const override;
     AXObject* computeParentIfExists() const override;
 
     // Low-level accessibility tree exploration.
     AXObject* firstChild() const override;
@@ skipping 35 matching lines @@
     float stepValueForRange() const;
     AXObject* findChildWithTagName(const HTMLQualifiedName&) const;
     bool isDescendantOfElementType(const HTMLQualifiedName& tagName) const;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXNodeObject, isAXNodeObject());
 
 } // namespace blink
 
 #endif // AXNodeObject_h