[debugger] make step positions for for-of compatible with interpreter.

src/full-codegen/full-codegen.h

Index: src/full-codegen/full-codegen.h
diff --git a/src/full-codegen/full-codegen.h b/src/full-codegen/full-codegen.h
index 56ae26d9033746bbb55e839610c5644c78975371..ac3022af194859d7a3f8d9bf9186409ee2276cfc 100644
--- a/src/full-codegen/full-codegen.h
+++ b/src/full-codegen/full-codegen.h
@@ -662,8 +662,7 @@ class FullCodeGenerator: public AstVisitor {
   // otherwise.
   void SetStatementPosition(Statement* stmt,
                             InsertBreak insert_break = INSERT_BREAK);
-  void SetExpressionPosition(Expression* expr,
-                             InsertBreak insert_break = SKIP_BREAK);
+  void SetExpressionPosition(Expression* expr);
 
   // 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.