[turbofan] Fix missing MachineOperator unittest.

src/compiler/machine-operator.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_MACHINE_OPERATOR_H_
 #define V8_COMPILER_MACHINE_OPERATOR_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/machine-type.h"
 
@@ skipping 212 matching lines @@
   }
   PSEUDO_OP_LIST(PSEUDO_OP)
 #undef PSEUDO_OP
 #undef PSEUDO_OP_LIST
 
  private:
   Zone* zone_;
   const MachineOperatorGlobalCache& cache_;
   const MachineType word_;
   const Flags flags_;
+
   DISALLOW_COPY_AND_ASSIGN(MachineOperatorBuilder);
 };
 
 
 DEFINE_OPERATORS_FOR_FLAGS(MachineOperatorBuilder::Flags)
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_OPERATOR_H_