Allow eval and arguments as property names

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 428 matching lines @@
     if (this->IsEvalOrArguments(function_name)) {
       Traits::ReportMessageAt(function_name_loc, "strict_eval_arguments");
       *ok = false;
       return;
     }
     if (function_name_is_strict_reserved) {
       Traits::ReportMessageAt(function_name_loc, "unexpected_strict_reserved");
       *ok = false;
       return;
     }
+    CheckStrictFunctionParameters(eval_args_error_loc, dupe_error_loc,
+                                  reserved_loc, ok);
+  }
+
+  // Validates strict mode for function parameter lists. This has to be
+  // done after parsing the function, since the function can declare
+  // itself strict.
+  void CheckStrictFunctionParameters(
+      const Scanner::Location& eval_args_error_loc,
+      const Scanner::Location& dupe_error_loc,
+      const Scanner::Location& reserved_loc, bool* ok) {
     if (eval_args_error_loc.IsValid()) {
       Traits::ReportMessageAt(eval_args_error_loc, "strict_eval_arguments");
       *ok = false;
       return;
     }
     if (dupe_error_loc.IsValid()) {
       Traits::ReportMessageAt(dupe_error_loc, "strict_param_dupe");
       *ok = false;
       return;
     }
@@ skipping 2638 matching lines @@
       *ok = false;
       return;
     }
     has_seen_constructor_ = true;
     return;
   }
 }
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H