Implement aria-placeholder

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 157 matching lines @@
                          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;
+  String placeholder(AXNameFrom) const override;
   bool nameFromLabelElement() const override;
 
   // Location
   void getRelativeBounds(AXObject** outContainer,
                          FloatRect& outBoundsInContainer,
                          SkMatrix44& outContainerTransform) const override;
 
   // High-level accessibility tree access.
   AXObject* computeParent() const override;
   AXObject* computeParentIfExists() const override;
@@ skipping 38 matching lines @@
   bool isNativeCheckboxInMixedState() const;
   String textFromDescendants(AXObjectSet& visited,
                              bool recursive) const override;
   String nativeTextAlternative(AXObjectSet& visited,
                                AXNameFrom&,
                                AXRelatedObjectVector*,
                                NameSources*,
                                bool* foundTextAlternative) const;
   float stepValueForRange() const;
   bool isDescendantOfElementType(const HTMLQualifiedName& tagName) const;
+  String placeholderFromNativeAttribute() const;
 };
 
 }  // namespace blink
 
 #endif  // AXNodeObject_h