| Index: src/preparser.h | 
| diff --git a/src/preparser.h b/src/preparser.h | 
| index 67a559c77f4367b49218607d8c0f66aaa41e5013..8f102d94317dddb1ce45e84d5f1392cf083d0ee7 100644 | 
| --- a/src/preparser.h | 
| +++ b/src/preparser.h | 
| @@ -1030,7 +1030,6 @@ class PreParserScope { | 
| void RecordArgumentsUsage() {} | 
| void RecordSuperPropertyUsage() {} | 
| void RecordSuperConstructorCallUsage() {} | 
| -  void RecordThisUsage() {} | 
|  | 
| // Allow scope->Foo() to work. | 
| PreParserScope* operator->() { return this; } | 
| @@ -1866,7 +1865,6 @@ ParserBase<Traits>::ParsePrimaryExpression(bool* ok) { | 
| switch (token) { | 
| case Token::THIS: { | 
| Consume(Token::THIS); | 
| -      scope_->RecordThisUsage(); | 
| result = this->ThisExpression(scope_, factory()); | 
| break; | 
| } | 
|  |