A few tests fails when I run them with --hydrogen-track-positions

src/preparser.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_PREPARSER_H
 #define V8_PREPARSER_H
 
 #include "src/v8.h"
 
 #include "src/bailout-reason.h"
@@ skipping 1357 matching lines @@
 
   // Producing data during the recursive descent.
   PreParserIdentifier GetSymbol(Scanner* scanner);
   PreParserIdentifier GetNumberAsSymbol(Scanner* scanner);
 
   static PreParserIdentifier GetNextSymbol(Scanner* scanner) {
     return PreParserIdentifier::Default();
   }
 
   static PreParserExpression ThisExpression(Scope* scope,
-                                            PreParserFactory* factory) {
+                                            PreParserFactory* factory,
+                                            int pos) {
     return PreParserExpression::This();
   }
 
   static PreParserExpression SuperReference(Scope* scope,
                                             PreParserFactory* factory) {
     return PreParserExpression::Super();
   }
 
   static PreParserExpression DefaultConstructor(bool call_super, Scope* scope,
                                                 int pos, int end_pos) {
@@ skipping 454 matching lines @@
   //   '(' Expression ')'
   //   TemplateLiteral
 
   int pos = peek_position();
   ExpressionT result = this->EmptyExpression();
   Token::Value token = peek();
   switch (token) {
     case Token::THIS: {
       Consume(Token::THIS);
       scope_->RecordThisUsage();
-      result = this->ThisExpression(scope_, factory());
+      result = this->ThisExpression(scope_, factory(), pos);
       break;
     }
 
     case Token::NULL_LITERAL:
     case Token::TRUE_LITERAL:
     case Token::FALSE_LITERAL:
     case Token::NUMBER:
       Next();
       result = this->ExpressionFromLiteral(token, pos, scanner(), factory());
       break;
@@ skipping 1218 matching lines @@
       *ok = false;
       return;
     }
     has_seen_constructor_ = true;
     return;
   }
 }
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H