Handle StepIn for constructors through PrepareStep just like for regular calls

src/full-codegen/full-codegen.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_FULL_CODEGEN_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_FULL_CODEGEN_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/ast.h"
@@ skipping 644 matching lines @@
                             InsertBreak insert_break = INSERT_BREAK);
   void SetExpressionPosition(Expression* expr,
                              InsertBreak insert_break = SKIP_BREAK);
 
   // Consider an expression a statement. As such, we also insert a break.
   // This is used in loop headers where we want to break for each iteration.
   void SetExpressionAsStatementPosition(Expression* expr);
 
   void SetCallPosition(Expression* expr, int argc);
 
-  void SetConstructCallPosition(Expression* expr);
+  void SetConstructCallPosition(Expression* expr, int argc);
 
   // Non-local control flow support.
   void EnterTryBlock(int handler_index, Label* handler);
   void ExitTryBlock(int handler_index);
   void EnterFinallyBlock();
   void ExitFinallyBlock();
   void ClearPendingMessage();
 
   // Loop nesting counter.
   int loop_depth() { return loop_depth_; }
@@ skipping 369 matching lines @@
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FULL_CODEGEN_FULL_CODEGEN_H_