Handle StepIn for constructors through PrepareStep just like for regular calls

src/runtime/runtime-object.cc

 // Copyright 2014 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/isolate-inl.h"
@@ skipping 986 matching lines @@
   CHECK(new_target->IsJSFunction());
   Handle<JSFunction> original_function = Handle<JSFunction>::cast(new_target);
 
 
   // Check that function is a constructor.
   if (!function->IsConstructor()) {
     THROW_NEW_ERROR_RETURN_FAILURE(
         isolate, NewTypeError(MessageTemplate::kNotConstructor, constructor));
   }
 
-  Debug* debug = isolate->debug();
-  // Handle stepping into constructors if step into is active.
-  if (debug->StepInActive()) debug->HandleStepIn(function, true);
-
   // The function should be compiled for the optimization hints to be
   // available.
   Compiler::Compile(function, CLEAR_EXCEPTION);
 
   JSFunction::EnsureHasInitialMap(function);
   if (function->initial_map()->instance_type() == JS_FUNCTION_TYPE) {
     // The 'Function' function ignores the receiver object when
     // called using 'new' and creates a new JSFunction object that
     // is returned.
     return isolate->heap()->undefined_value();
@@ skipping 546 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_ObjectDefineProperties) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(Object, o, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, properties, 1);
   return JSReceiver::DefineProperties(isolate, o, properties);
 }
 }  // namespace internal
 }  // namespace v8