[debugger] do not expose temporary variables introduced by the parser.

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 4176 matching lines @@
   VariableMode ContextLocalMode(int var);
 
   // Return the initialization flag of the given context local.
   InitializationFlag ContextLocalInitFlag(int var);
 
   // Return the initialization flag of the given context local.
   MaybeAssignedFlag ContextLocalMaybeAssignedFlag(int var);
 
   // Return true if this local was introduced by the compiler, and should not be
   // exposed to the user in a debugger.
-  bool LocalIsSynthetic(int var);
+  static bool VariableIsSynthetic(String* name);
 
   // Lookup support for serialized scope info. Returns the
   // the stack slot index for a given slot name if the slot is
   // present; otherwise returns a value < 0. The name must be an internalized
   // string.
   int StackSlotIndex(String* name);
 
   // Lookup support for serialized scope info. Returns the local context slot
   // index for a given slot name if the slot is present; otherwise
   // returns a value < 0. The name must be an internalized string.
@@ skipping 6581 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_