Find the correct function for script break points

src/objects.h

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3087 matching lines @@
   inline void set_start_position(int start_position);
 
   // End position of this function in the script source.
   inline int end_position();
   inline void set_end_position(int end_position);
 
   // Is this function a function expression in the source code.
   inline bool is_expression();
   inline void set_is_expression(bool value);
 
-  // Is this function a top-level function. Used for accessing the
-  // caller of functions. Top-level functions (scripts, evals) are
-  // returned as null; see JSFunction::GetCallerAccessor(...).
+  // Is this function a top-level function (scripts, evals).
   inline bool is_toplevel();
   inline void set_is_toplevel(bool value);
 
   // Bit field containing various information collected by the compiler to
   // drive optimization.
   inline int compiler_hints();
   inline void set_compiler_hints(int value);
 
   // Add information on assignments of the form this.x = ...;
   void SetThisPropertyAssignmentsInfo(
@@ skipping 1744 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_