Refactored the code for handling debug step in in the runtime system into one...

src/debug.h

 // Copyright 2006-2008 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 187 matching lines @@
   // Getter for the debug_context.
   inline static Handle<Context> debug_context() { return debug_context_; }
 
   // Check whether a global object is the debug global object.
   static bool IsDebugGlobal(GlobalObject* global);
 
   // Fast check to see if any break points are active.
   inline static bool has_break_points() { return has_break_points_; }
 
   static bool StepInActive() { return thread_local_.step_into_fp_ != 0; }
+  static void HandleStepIn(Handle<JSFunction> function,
+                           Address fp,
+                           bool is_constructor);
   static Address step_in_fp() { return thread_local_.step_into_fp_; }
   static Address* step_in_fp_addr() { return &thread_local_.step_into_fp_; }
 
   // Getter and setter for the disable break state.
   static bool disable_break() { return disable_break_; }
   static void set_disable_break(bool disable_break) {
     disable_break_ = disable_break;
   }
 
   // Getters for the current exception break state.
@@ skipping 370 matching lines @@
   }
  private:
   Debug::AddressId id_;
   int reg_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8_DEBUG_H_