Expose InlineTextBoxes in the accessibility tree.

Source/core/accessibility/AccessibilityRenderObject.h

Index: Source/core/accessibility/AccessibilityRenderObject.h
diff --git a/Source/core/accessibility/AccessibilityRenderObject.h b/Source/core/accessibility/AccessibilityRenderObject.h
index 06e88054c0bd6d2d72e4574fee48d67d92c85566..7a96b8fe0dbbc05ac3722e0b486aedbfa0fbbfd3 100644
--- a/Source/core/accessibility/AccessibilityRenderObject.h
+++ b/Source/core/accessibility/AccessibilityRenderObject.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;