De-generify the GenericGraph.

src/compiler/generic-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_GENERIC_GRAPH_H_
-#define V8_COMPILER_GENERIC_GRAPH_H_
-
-#include "src/compiler/generic-node.h"
-
-namespace v8 {
-namespace internal {
-
-class Zone;
-
-namespace compiler {
-
-class GenericGraphBase : public ZoneObject {
- public:
-  explicit GenericGraphBase(Zone* zone) : zone_(zone), next_node_id_(0) {}
-
-  Zone* zone() const { return zone_; }
-
-  NodeId NextNodeID() { return next_node_id_++; }
-  NodeId NodeCount() const { return next_node_id_; }
-
- private:
-  Zone* zone_;
-  NodeId next_node_id_;
-};
-
-template <class V>
-class GenericGraph : public GenericGraphBase {
- public:
-  explicit GenericGraph(Zone* zone)
-      : GenericGraphBase(zone), start_(NULL), end_(NULL) {}
-
-  V* start() const { return start_; }
-  V* end() const { return end_; }
-
-  void SetStart(V* start) { start_ = start; }
-  void SetEnd(V* end) { end_ = end; }
-
- private:
-  V* start_;
-  V* end_;
-
-  DISALLOW_COPY_AND_ASSIGN(GenericGraph);
-};
-}
-}
-}  // namespace v8::internal::compiler
-
-#endif  // V8_COMPILER_GENERIC_GRAPH_H_