Debugger: use correct position for for-next expression statement.

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index d4da7ce53283a8c8cdc9d1678cc96543132f8a2e..9334a33195a1e21f474055863bc28dd47fa2cb93 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -3752,9 +3752,8 @@ Statement* Parser::ParseForStatement(ZoneList<const AstRawString*>* labels,
 
   Statement* next = NULL;
   if (peek() != Token::RPAREN) {
-    int next_pos = position();
     Expression* exp = ParseExpression(true, CHECK_OK);
-    next = factory()->NewExpressionStatement(exp, next_pos);
+    next = factory()->NewExpressionStatement(exp, exp->position());
   }
   Expect(Token::RPAREN, CHECK_OK);