new classes: implement new.target passing to superclass constructor.

src/objects.h

 // Copyright 2012 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/allocation.h"
@@ skipping 6752 matching lines @@
   DECL_ACCESSORS(construct_stub, Code)
 
   // Returns if this function has been compiled to native code yet.
   inline bool is_compiled();
 
   // [length]: The function length - usually the number of declared parameters.
   // Use up to 2^30 parameters.
   inline int length() const;
   inline void set_length(int value);
 
-  // [formal parameter count]: The declared number of parameters.
-  inline int formal_parameter_count() const;
-  inline void set_formal_parameter_count(int value);
+  // [internal formal parameter count]: The declared number of parameters.
+  // For subclass constructors, also includes new.target.
+  // The size of function's frame is internal_formal_parameter_count + 1.
+  inline int internal_formal_parameter_count() const;
+  inline void set_internal_formal_parameter_count(int value);
 
   // Set the formal parameter count so the function code will be
   // called without using argument adaptor frames.
   inline void DontAdaptArguments();
 
   // [expected_nof_properties]: Expected number of properties for the function.
   inline int expected_nof_properties() const;
   inline void set_expected_nof_properties(int value);
 
   // [feedback_vector] - accumulates ast node feedback from full-codegen and
@@ skipping 4179 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_