[turbofan] More const-correctness changes.

src/compiler/graph.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_GRAPH_H_
 #define V8_COMPILER_GRAPH_H_
 
 #include <map>
 #include <set>
 
 #include "src/compiler/generic-algorithm.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-aux-data.h"
 #include "src/compiler/source-position.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 class GraphDecorator;
 
 
 class Graph : public GenericGraph<Node> {
  public:
   explicit Graph(Zone* zone);
 
   // Base implementation used by all factory methods.
-  Node* NewNode(Operator* op, int input_count, Node** inputs);
+  Node* NewNode(const Operator* op, int input_count, Node** inputs);
 
   // Factories for nodes with static input counts.
-  Node* NewNode(Operator* op) {
+  Node* NewNode(const Operator* op) {
     return NewNode(op, 0, static_cast<Node**>(NULL));
   }
-  Node* NewNode(Operator* op, Node* n1) { return NewNode(op, 1, &n1); }
-  Node* NewNode(Operator* op, Node* n1, Node* n2) {
+  Node* NewNode(const Operator* op, Node* n1) { return NewNode(op, 1, &n1); }
+  Node* NewNode(const Operator* op, Node* n1, Node* n2) {
     Node* nodes[] = {n1, n2};
     return NewNode(op, arraysize(nodes), nodes);
   }
-  Node* NewNode(Operator* op, Node* n1, Node* n2, Node* n3) {
+  Node* NewNode(const Operator* op, Node* n1, Node* n2, Node* n3) {
     Node* nodes[] = {n1, n2, n3};
     return NewNode(op, arraysize(nodes), nodes);
   }
-  Node* NewNode(Operator* op, Node* n1, Node* n2, Node* n3, Node* n4) {
+  Node* NewNode(const Operator* op, Node* n1, Node* n2, Node* n3, Node* n4) {
     Node* nodes[] = {n1, n2, n3, n4};
     return NewNode(op, arraysize(nodes), nodes);
   }
-  Node* NewNode(Operator* op, Node* n1, Node* n2, Node* n3, Node* n4,
+  Node* NewNode(const Operator* op, Node* n1, Node* n2, Node* n3, Node* n4,
                 Node* n5) {
     Node* nodes[] = {n1, n2, n3, n4, n5};
     return NewNode(op, arraysize(nodes), nodes);
   }
-  Node* NewNode(Operator* op, Node* n1, Node* n2, Node* n3, Node* n4, Node* n5,
-                Node* n6) {
+  Node* NewNode(const Operator* op, Node* n1, Node* n2, Node* n3, Node* n4,
+                Node* n5, Node* n6) {
     Node* nodes[] = {n1, n2, n3, n4, n5, n6};
     return NewNode(op, arraysize(nodes), nodes);
   }
 
-  void ChangeOperator(Node* node, Operator* op);
-  void DeleteNode(Node* node);
-
   template <class Visitor>
   void VisitNodeUsesFrom(Node* node, Visitor* visitor);
 
   template <class Visitor>
   void VisitNodeUsesFromStart(Visitor* visitor);
 
   template <class Visitor>
   void VisitNodeInputsFromEnd(Visitor* visitor);
 
   void AddDecorator(GraphDecorator* decorator) {
@@ skipping 10 matching lines @@
  private:
   ZoneVector<GraphDecorator*> decorators_;
 };
 
 
 class GraphDecorator : public ZoneObject {
  public:
   virtual ~GraphDecorator() {}
   virtual void Decorate(Node* node) = 0;
 };
-}
-}
-}  // namespace v8::internal::compiler
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_COMPILER_GRAPH_H_