[turbofan] Fix missing operators for JSGlobalSpecialization::Flags.

src/compiler/js-global-specialization.h

 // Copyright 2015 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_JS_GLOBAL_SPECIALIZATION_H_
 #define V8_COMPILER_JS_GLOBAL_SPECIALIZATION_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/simplified-operator.h"
@@ skipping 57 matching lines @@
 
   JSGraph* const jsgraph_;
   Flags const flags_;
   Handle<GlobalObject> global_object_;
   CompilationDependencies* const dependencies_;
   SimplifiedOperatorBuilder simplified_;
 
   DISALLOW_COPY_AND_ASSIGN(JSGlobalSpecialization);
 };
 
+DEFINE_OPERATORS_FOR_FLAGS(JSGlobalSpecialization::Flags)
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_GLOBAL_SPECIALIZATION_H_