[turbofan] Use appropriate type for NodeId.

src/compiler/graph.cc

 // 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.
 
 #include "src/compiler/graph.h"
 
 #include <algorithm>
 
 #include "src/base/bits.h"
 #include "src/compiler/node.h"
@@ skipping 35 matching lines @@
   DCHECK_LE(op->ValueInputCount(), input_count);
   Node* const node =
       Node::New(zone(), NextNodeId(), op, input_count, inputs, incomplete);
   Decorate(node, incomplete);
   return node;
 }
 
 
 NodeId Graph::NextNodeId() {
   NodeId const id = next_node_id_;
-  CHECK(!base::bits::SignedAddOverflow32(id, 1, &next_node_id_));
+  CHECK(!base::bits::UnsignedAddOverflow32(id, 1, &next_node_id_));
   return id;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8