Clean up child checks in ContainerNode.

sky/engine/core/dom/Document.cpp

Index: sky/engine/core/dom/Document.cpp
diff --git a/sky/engine/core/dom/Document.cpp b/sky/engine/core/dom/Document.cpp
index 2b2c4faa55f9aaaa49d19e04812d49660eeb6999..72d8c608e825542b77123989b2da6d9b661cc366 100644
--- a/sky/engine/core/dom/Document.cpp
+++ b/sky/engine/core/dom/Document.cpp
@@ -1678,78 +1678,6 @@ MouseEventWithHitTestResults Document::prepareMouseEvent(const HitTestRequest& r
     return MouseEventWithHitTestResults(event, result);
 }
 
-// DOM Section 1.1.1
-bool Document::childTypeAllowed(NodeType type) const
-{
-    switch (type) {
-    case DOCUMENT_FRAGMENT_NODE:
-    case DOCUMENT_NODE:
-    case TEXT_NODE:
-        return false;
-    case ELEMENT_NODE:
-        // Documents may contain no more than one of each of these.
-        // (One Element and one DocumentType.)
-        for (Node* c = firstChild(); c; c = c->nextSibling())
-            if (c->nodeType() == type)
-                return false;
-        return true;
-    }
-    return false;
-}
-
-bool Document::canReplaceChild(const Node& newChild, const Node& oldChild) const
-{
-    if (oldChild.nodeType() == newChild.nodeType())
-        return true;
-
-    int numElements = 0;
-
-    // First, check how many doctypes and elements we have, not counting
-    // the child we're about to remove.
-    for (Node* c = firstChild(); c; c = c->nextSibling()) {
-        if (c == oldChild)
-            continue;
-
-        switch (c->nodeType()) {
-        case ELEMENT_NODE:
-            numElements++;
-            break;
-        default:
-            break;
-        }
-    }
-
-    // Then, see how many doctypes and elements might be added by the new child.
-    if (newChild.isDocumentFragment()) {
-        for (Node* c = toDocumentFragment(newChild).firstChild(); c; c = c->nextSibling()) {
-            switch (c->nodeType()) {
-            case DOCUMENT_FRAGMENT_NODE:
-            case DOCUMENT_NODE:
-            case TEXT_NODE:
-                return false;
-            case ELEMENT_NODE:
-                numElements++;
-                break;
-            }
-        }
-    } else {
-        switch (newChild.nodeType()) {
-        case DOCUMENT_FRAGMENT_NODE:
-        case DOCUMENT_NODE:
-        case TEXT_NODE:
-            return false;
-        case ELEMENT_NODE:
-            numElements++;
-            break;
-        }
-    }
-
-    if (numElements > 1)
-        return false;
-
-    return true;
-}
-
 PassRefPtr<Node> Document::cloneNode(bool deep)
 {
     RefPtr<Document> clone = cloneDocumentWithoutChildren();