Fix Win64 build

test/cctest/compiler/test-node.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 <functional>
+
 #include "src/v8.h"
 
 #include "graph-tester.h"
 #include "src/compiler/generic-node-inl.h"
 #include "src/compiler/node.h"
 #include "src/compiler/operator.h"
 
 using namespace v8::internal;
 using namespace v8::internal::compiler;
 
@@ skipping 789 matching lines @@
     n1->ReplaceInput(0, n1);  // self-reference.
 
     CHECK_EQ(0, n0->UseCount());
     CHECK_EQ(1, n1->UseCount());
     n1->RemoveAllInputs();
     CHECK_EQ(1, n1->InputCount());
     CHECK_EQ(0, n1->UseCount());
     CHECK_EQ(NULL, n1->InputAt(0));
   }
 }