[turbofan] Use appropriate type for NodeId.

test/unittests/compiler/control-equivalence-unittest.cc

 // Copyright 2014 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/bit-vector.h"
 #include "src/compiler/control-equivalence.h"
 #include "src/compiler/graph-visualizer.h"
 #include "src/compiler/node-properties.h"
 #include "src/zone-containers.h"
 #include "test/unittests/compiler/graph-unittest.h"
@@ skipping 23 matching lines @@
     }
     ControlEquivalence equivalence(zone(), graph());
     equivalence.Run(node);
     classes_.resize(graph()->NodeCount());
     for (Node* node : all_nodes_) {
       classes_[node->id()] = equivalence.ClassOf(node);
     }
   }
 
   bool IsEquivalenceClass(size_t length, Node** nodes) {
-    BitVector in_class(graph()->NodeCount(), zone());
+    BitVector in_class(static_cast<int>(graph()->NodeCount()), zone());
     size_t expected_class = classes_[nodes[0]->id()];
     for (size_t i = 0; i < length; ++i) {
       in_class.Add(nodes[i]->id());
     }
     for (Node* node : all_nodes_) {
       if (in_class.Contains(node->id())) {
         if (classes_[node->id()] != expected_class) return false;
       } else {
         if (classes_[node->id()] == expected_class) return false;
       }
@@ skipping 191 matching lines @@
   ASSERT_EQUIVALENCE(t2);
   ASSERT_EQUIVALENCE(f2);
   ASSERT_EQUIVALENCE(f3);
   ASSERT_EQUIVALENCE(lp);
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8