Expose InlineTextBoxes in the accessibility tree.

Source/core/accessibility/AXRenderObject.h

Index: Source/core/accessibility/AXRenderObject.h
diff --git a/Source/core/accessibility/AXRenderObject.h b/Source/core/accessibility/AXRenderObject.h
index 95a3d9249e83da83a9cf7b397058420da660d884..6c73eb500458a7a7db9638112caea13ff483e180 100644
--- a/Source/core/accessibility/AXRenderObject.h
+++ b/Source/core/accessibility/AXRenderObject.h
@@ -191,6 +191,7 @@ protected:
     // Notifications that this object may have changed.
     virtual void handleActiveDescendantChanged() OVERRIDE;
     virtual void handleAriaExpandedChanged() OVERRIDE;
+    virtual void textChanged() OVERRIDE;
 
     // Text metrics. Most of these should be deprecated, needs major cleanup.
     virtual int index(const VisiblePosition&) const OVERRIDE;
@@ -219,6 +220,8 @@ private:
     void addCanvasChildren();
     void addAttachmentChildren();
     void addRemoteSVGChildren();
+    void addInlineTextBoxChildren();
+
     void ariaSelectedRows(AccessibilityChildrenVector&);
     bool elementAttributeValue(const QualifiedName&) const;
     bool inheritsPresentationalRole() const;