Make strict more error messages about "eval" and "arguments" less specific.

src/preparser.h

Index: src/preparser.h
diff --git a/src/preparser.h b/src/preparser.h
index e99b4b0a181e200030100aa10446cfa2cb7bf923..0db902fa3e96d087515420ec691940d4c60a649f 100644
--- a/src/preparser.h
+++ b/src/preparser.h
@@ -76,6 +76,11 @@ class ParserBase {
   }
 
  protected:
+  enum AllowEvalOrArgumentsAsIdentifier {
+    kAllowEvalOrArguments,
+    kDontAllowEvalOrArguments
+  };
+
   Scanner* scanner() const { return scanner_; }
   int position() { return scanner_->location().beg_pos; }
   int peek_position() { return scanner_->peek_location().beg_pos; }
@@ -640,7 +645,7 @@ class PreParser : public ParserBase {
   Expression ParseFunctionLiteral(bool is_generator, bool* ok);
   void ParseLazyFunctionLiteralBody(bool* ok);
 
-  Identifier ParseIdentifier(bool* ok);
+  Identifier ParseIdentifier(AllowEvalOrArgumentsAsIdentifier, bool* ok);
   Identifier ParseIdentifierName(bool* ok);
   Identifier ParseIdentifierNameOrGetOrSet(bool* is_get,
                                            bool* is_set,