Use text affinity to return correct accessible line boundaries.

third_party/WebKit/public/web/WebAXObject.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 168 matching lines @@
     // where the description was derived from, and a list of objects that were used to
     // derive the description, if any.
     BLINK_EXPORT WebString description(WebAXNameFrom, WebAXDescriptionFrom&, WebVector<WebAXObject>& descriptionObjects) const;
     // Takes the result of nameFrom and descriptionFrom from calling |name| and |description|,
     // above, and retrieves the placeholder of the object, if present and if it wasn't already
     // exposed by one of the two functions above.
     BLINK_EXPORT WebString placeholder(WebAXNameFrom, WebAXDescriptionFrom) const;
 
     // The following selection functions get or set the global document
     // selection and can be called on any object in the tree.
-    BLINK_EXPORT void selection(WebAXObject& anchorObject, int& anchorOffset,
-        WebAXObject& focusObject, int& focusOffset) const;
+    BLINK_EXPORT void selection(WebAXObject& anchorObject, int& anchorOffset, WebAXTextAffinity& anchorAffinity,
+        WebAXObject& focusObject, int& focusOffset, WebAXTextAffinity& focusAffinity) const;
     BLINK_EXPORT void setSelection(const WebAXObject& anchorObject, int anchorOffset,
         const WebAXObject& focusObject, int focusOffset) const;
 
     // The following selection functions return text offsets calculated starting
     // the current object. They only report on a selection that is placed on
     // the current object or on any of its descendants.
     BLINK_EXPORT unsigned selectionEnd() const;
     BLINK_EXPORT unsigned selectionEndLineNumber() const;
     BLINK_EXPORT unsigned selectionStart() const;
     BLINK_EXPORT unsigned selectionStartLineNumber() const;
@@ skipping 123 matching lines @@
     operator AXObject*() const;
 #endif
 
 private:
     WebPrivatePtr<AXObject> m_private;
 };
 
 } // namespace blink
 
 #endif