Move Node::isBlockFlowElement() to htmlediting.h

Source/core/editing/htmlediting.cpp

Index: Source/core/editing/htmlediting.cpp
diff --git a/Source/core/editing/htmlediting.cpp b/Source/core/editing/htmlediting.cpp
index 08fecaa38404e3b71bcc208e5a2df6077399a8d5..bd9eef7e1f8b471f9f8b92270ccbc05ac8cb231a 100644
--- a/Source/core/editing/htmlediting.cpp
+++ b/Source/core/editing/htmlediting.cpp
@@ -336,11 +336,11 @@ Element* enclosingBlock(Node* node, EditingBoundaryCrossingRule rule)
 
 Element* enclosingBlockFlowElement(Node& node)
 {
-    if (node.isBlockFlowElement())
+    if (isBlockFlowElement(node))
         return &toElement(node);
 
     for (Node* n = node.parentNode(); n; n = n->parentNode()) {
-        if (n->isBlockFlowElement() || isHTMLBodyElement(*n))
+        if (isBlockFlowElement(*n) || isHTMLBodyElement(*n))
             return toElement(n);
     }
     return 0;
@@ -1199,6 +1199,12 @@ bool isNonTableCellHTMLBlockElement(const Node* node)
         || element.hasTagName(h5Tag);
 }
 
+bool isBlockFlowElement(const Node& node)
+{
+    RenderObject* renderer = node.renderer();
+    return node.isElementNode() && renderer && renderer->isRenderBlockFlow();
+}
+
 Position adjustedSelectionStartForStyleComputation(const VisibleSelection& selection)
 {
     // This function is used by range style computations to avoid bugs like: