Classes: Add support for stepping through default constructors

src/debug.h

Index: src/debug.h
diff --git a/src/debug.h b/src/debug.h
index e486d9780bcf0d77ff3f376aa26103d47ebf1324..43a0009d662b06753c7cd398007d4c60c513b91c 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -390,6 +390,7 @@ class Debug {
   void FloodWithOneShot(Handle<JSFunction> function,
                         BreakLocatorType type = ALL_BREAK_LOCATIONS);
   void FloodBoundFunctionWithOneShot(Handle<JSFunction> function);
+  void FloodDefaultConstructorWithOneShot(Handle<JSFunction> function);
   void FloodHandlerWithOneShot();
   void ChangeBreakOnException(ExceptionBreakType type, bool enable);
   bool IsBreakOnException(ExceptionBreakType type);