Revert "[turbofan] Merge GenericNode with Node."

src/compiler/generic-algorithm.h

Index: src/compiler/generic-algorithm.h
diff --git a/src/compiler/generic-algorithm.h b/src/compiler/generic-algorithm.h
index c23190e9d7d6d52c3b16aa11355e6807c4fca9e3..cd4984f68cef8c97d75c2e0ba81d3861607ff1db 100644
--- a/src/compiler/generic-algorithm.h
+++ b/src/compiler/generic-algorithm.h
@@ -8,6 +8,7 @@
 #include <stack>
 
 #include "src/compiler/generic-graph.h"
+#include "src/compiler/generic-node.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
@@ -98,12 +99,12 @@ class GenericGraphVisit {
     Visit<Visitor, Traits>(graph, zone, &array[0], &array[1], visitor);
   }
 
-  template <class Node>
+  template <class B, class S>
   struct NullNodeVisitor {
-    Control Pre(Node* node) { return CONTINUE; }
-    Control Post(Node* node) { return CONTINUE; }
-    void PreEdge(Node* from, int index, Node* to) {}
-    void PostEdge(Node* from, int index, Node* to) {}
+    Control Pre(GenericNode<B, S>* node) { return CONTINUE; }
+    Control Post(GenericNode<B, S>* node) { return CONTINUE; }
+    void PreEdge(GenericNode<B, S>* from, int index, GenericNode<B, S>* to) {}
+    void PostEdge(GenericNode<B, S>* from, int index, GenericNode<B, S>* to) {}
   };
 
  private: