Move Node::isBlockFlowElement() to htmlediting.h

Source/core/dom/Node.h

Index: Source/core/dom/Node.h
diff --git a/Source/core/dom/Node.h b/Source/core/dom/Node.h
index 83c2579377172bbfe2b32eb5e2b25408125261a3..75078685561d9cac6297a44bd8a2ce27b8f646a6 100644
--- a/Source/core/dom/Node.h
+++ b/Source/core/dom/Node.h
@@ -299,8 +299,6 @@ public:
     // Returns the enclosing event parent node (or self) that, when clicked, would trigger a navigation.
     Node* enclosingLinkEventParentOrSelf();
 
-    bool isBlockFlowElement() const;
-
     // These low-level calls give the caller responsibility for maintaining the integrity of the tree.
     void setPreviousSibling(Node* previous) { m_previous = previous; }
     void setNextSibling(Node* next) { m_next = next; }