Remove ENTITY_REFERENCE_NODE

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 a25bfb9804bb449b2ede37d78209dbf96c67d114..4256a5986c0edf602b926724a543e38404e899b9 100644
--- a/Source/core/dom/ContainerNode.cpp
+++ b/Source/core/dom/ContainerNode.cpp
@@ -166,7 +166,6 @@ static inline ExceptionCode checkAcceptChild(ContainerNode* newParent, Node* new
 
     // Use common case fast path if possible.
     if ((newChild->isElementNode() || newChild->isTextNode()) && newParent->isElementNode()) {
-        ASSERT(!newParent->isReadOnlyNode());
         ASSERT(!newParent->isDocumentTypeNode());
         ASSERT(isChildTypeAllowed(newParent, newChild));
         if (containsConsideringHostElements(newChild, newParent))
@@ -179,8 +178,6 @@ static inline ExceptionCode checkAcceptChild(ContainerNode* newParent, Node* new
     if (newChild->isPseudoElement())
         return HIERARCHY_REQUEST_ERR;
 
-    if (newParent->isReadOnlyNode())
-        return NO_MODIFICATION_ALLOWED_ERR;
     if (newChild->inDocument() && newChild->isDocumentTypeNode())
         return HIERARCHY_REQUEST_ERR;
     if (containsConsideringHostElements(newChild, newParent))
@@ -197,7 +194,6 @@ static inline ExceptionCode checkAcceptChild(ContainerNode* newParent, Node* new
 
 static inline bool checkAcceptChildGuaranteedNodeTypes(ContainerNode* newParent, Node* newChild, ExceptionCode& ec)
 {
-    ASSERT(!newParent->isReadOnlyNode());
     ASSERT(!newParent->isDocumentTypeNode());
     ASSERT(isChildTypeAllowed(newParent, newChild));
     if (newChild->contains(newParent)) {
@@ -474,12 +470,6 @@ bool ContainerNode::removeChild(Node* oldChild, ExceptionCode& ec)
 
     ec = 0;
 
-    // NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
-    if (isReadOnlyNode()) {
-        ec = NO_MODIFICATION_ALLOWED_ERR;
-        return false;
-    }
-
     // NOT_FOUND_ERR: Raised if oldChild is not a child of this node.
     if (!oldChild || oldChild->parentNode() != this) {
         ec = NOT_FOUND_ERR;