Get rid of extraneous accessibility tree traversal code.

Source/WebKit/chromium/src/WebAccessibilityObject.cpp

Index: Source/WebKit/chromium/src/WebAccessibilityObject.cpp
diff --git a/Source/WebKit/chromium/src/WebAccessibilityObject.cpp b/Source/WebKit/chromium/src/WebAccessibilityObject.cpp
index 0cb5b1d9a19b51bc2df960442da8bde2ac7348a0..fab6bbf15f33afc211404ef56c85fcf4e0627cd3 100644
--- a/Source/WebKit/chromium/src/WebAccessibilityObject.cpp
+++ b/Source/WebKit/chromium/src/WebAccessibilityObject.cpp
@@ -192,43 +192,6 @@ WebAccessibilityObject WebAccessibilityObject::childAt(unsigned index) const
     return WebAccessibilityObject(m_private->children()[index]);
 }
 
-WebAccessibilityObject WebAccessibilityObject::firstChild() const
-{
-    if (isDetached())
-        return WebAccessibilityObject();
-
-    return WebAccessibilityObject(m_private->firstChild());
-}
-
-WebAccessibilityObject WebAccessibilityObject::focusedChild() const
-{
-    if (isDetached())
-        return WebAccessibilityObject();
-
-    RefPtr<AccessibilityObject> focused = m_private->focusedUIElement();
-    if (m_private.get() == focused.get() || m_private.get() == focused->parentObject())
-        return WebAccessibilityObject(focused);
-
-    return WebAccessibilityObject();
-}
-
-WebAccessibilityObject WebAccessibilityObject::lastChild() const
-{
-    if (isDetached())
-        return WebAccessibilityObject();
-
-    return WebAccessibilityObject(m_private->lastChild());
-}
-
-
-WebAccessibilityObject WebAccessibilityObject::nextSibling() const
-{
-    if (isDetached())
-        return WebAccessibilityObject();
-
-    return WebAccessibilityObject(m_private->nextSibling());
-}
-
 WebAccessibilityObject WebAccessibilityObject::parentObject() const
 {
     if (isDetached())
@@ -237,15 +200,6 @@ WebAccessibilityObject WebAccessibilityObject::parentObject() const
     return WebAccessibilityObject(m_private->parentObject());
 }
 
-
-WebAccessibilityObject WebAccessibilityObject::previousSibling() const
-{
-    if (isDetached())
-        return WebAccessibilityObject();
-
-    return WebAccessibilityObject(m_private->previousSibling());
-}
-
 bool WebAccessibilityObject::canSetSelectedAttribute() const
 {
     if (isDetached())