Expose InlineTextBoxes in the accessibility tree.

Source/core/accessibility/AccessibilityObject.h

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * 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.
@@ skipping 83 matching lines @@
     GroupRole,
     GrowAreaRole,
     HeadingRole,
     HelpTagRole,
     HorizontalRuleRole,
     IgnoredRole,
     ImageMapLinkRole,
     ImageMapRole,
     ImageRole,
     IncrementorRole,
+    InlineTextBoxRole,
     LabelRole,
     LegendRole,
     LinkRole,
     ListBoxOptionRole,
     ListBoxRole,
     ListItemRole,
     ListMarkerRole,
     ListRole,
     LogRole,
     MainRole,
@@ skipping 288 matching lines @@
     virtual int headingLevel() const { return 0; }
     // 1-based, to match the aria-level spec.
     virtual unsigned hierarchicalLevel() const { return 0; }
     virtual AccessibilityOrientation orientation() const;
     virtual int tableLevel() const { return 0; }
     virtual String text() const { return String(); }
     virtual int textLength() const { return 0; }
     virtual AccessibilityObject* titleUIElement() const { return 0; }
     virtual KURL url() const { return KURL(); }
 
+    // For an inline text box.
+    // The integer horizontal pixel offset of each character in the string; negative values for RTL.
+    virtual void textCharacterOffsets(Vector<int>&) const { }
+    // The start and end character offset of each word in the inline text box.
+    virtual void wordBoundaries(Vector<int>& starts, Vector<int>& ends) const { }
+
     // Properties of interactive elements.
     virtual String actionVerb() const;
     virtual AccessibilityButtonState checkboxOrRadioValue() const;
     virtual void colorValue(int& r, int& g, int& b) const { r = 0; g = 0; b = 0; }
     virtual String valueDescription() const { return String(); }
     virtual float valueForRange() const { return 0.0f; }
     virtual float maxValueForRange() const { return 0.0f; }
     virtual float minValueForRange() const { return 0.0f; }
     const AtomicString& placeholderValue() const;
     virtual void selectedChildren(AccessibilityChildrenVector&) { }
@@ skipping 163 matching lines @@
 #if !HAVE(ACCESSIBILITY)
 inline const AccessibilityObject::AccessibilityChildrenVector& AccessibilityObject::children() { return m_children; }
 inline String AccessibilityObject::actionVerb() const { return emptyString(); }
 inline int AccessibilityObject::lineForPosition(const VisiblePosition&) const { return -1; }
 inline void AccessibilityObject::updateBackingStore() { }
 #endif
 
 } // namespace WebCore
 
 #endif // AccessibilityObject_h