Merge appendChildToContainer into ContainerNode

Source/core/dom/ContainerNode.cpp

Index: Source/core/dom/ContainerNode.cpp
diff --git a/Source/core/dom/ContainerNode.cpp b/Source/core/dom/ContainerNode.cpp
index fed648dbb0002f7a4a4f906e439df3f33500c162..837a135f602df0890efc15cd5b3961e536ee53b3 100644
--- a/Source/core/dom/ContainerNode.cpp
+++ b/Source/core/dom/ContainerNode.cpp
@@ -271,6 +271,20 @@ void ContainerNode::insertBeforeCommon(Node& nextChild, Node& newChild)
     newChild.setNextSibling(&nextChild);
 }
 
+void ContainerNode::appendChildCommon(Node& child)
+{
+    child.setParentOrShadowHostNode(this);
+
+    if (m_lastChild) {
+        child.setPreviousSibling(m_lastChild);
+        m_lastChild->setNextSibling(&child);
+    } else {
+        setFirstChild(&child);
+    }
+
+    setLastChild(&child);
+}
+
 void ContainerNode::parserInsertBefore(PassRefPtrWillBeRawPtr<Node> newChild, Node& nextChild)
 {
     ASSERT(newChild);
@@ -374,7 +388,7 @@ void ContainerNode::replaceChild(PassRefPtrWillBeRawPtr<Node> newChild, Node* ol
             if (next)
                 insertBeforeCommon(*next, child);
             else
-                appendChildToContainer(child, *this);
+                appendChildCommon(child);
         }
 
         updateTreeAfterInsertion(child);
@@ -622,7 +636,7 @@ void ContainerNode::appendChild(PassRefPtrWillBeRawPtr<Node> newChild, Exception
             ScriptForbiddenScope forbidScript;
 
             treeScope().adoptIfNeeded(child);
-            appendChildToContainer(child, *this);
+            appendChildCommon(child);
         }
 
         updateTreeAfterInsertion(child);
@@ -648,8 +662,7 @@ void ContainerNode::parserAppendChild(PassRefPtrWillBeRawPtr<Node> newChild)
         ScriptForbiddenScope forbidScript;
 
         treeScope().adoptIfNeeded(*newChild);
-        // FIXME: This method should take a PassRefPtr.
-        appendChildToContainer(*newChild, *this);
+        appendChildCommon(*newChild);
         newChild->updateAncestorConnectedSubframeCountForInsertion();
         ChildListMutationScope(*this).childAdded(*newChild);
     }