move remaining uses of scanner literals into scanner

src/preparser.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1146 matching lines @@
     bool is_strict_reserved = false;
     Identifier param_name =
         ParseIdentifierOrStrictReservedWord(&is_strict_reserved, CHECK_OK);
     if (!eval_args_error_loc.IsValid() && param_name.IsEvalOrArguments()) {
       eval_args_error_loc = scanner()->location();
     }
     if (!reserved_error_loc.IsValid() && is_strict_reserved) {
       reserved_error_loc = scanner()->location();
     }
 
-    int prev_value;
-    if (scanner()->is_literal_one_byte()) {
-      prev_value = duplicate_finder.AddAsciiSymbol(
-          scanner()->literal_one_byte_string(), 1);
-    } else {
-      prev_value =
-          duplicate_finder.AddUtf16Symbol(scanner()->literal_utf16_string(), 1);
-    }
+    int prev_value = scanner()->FindSymbol(&duplicate_finder, 1);
 
     if (!dupe_error_loc.IsValid() && prev_value != 0) {
       dupe_error_loc = scanner()->location();
     }
 
     done = (peek() == Token::RPAREN);
     if (!done) {
       Expect(Token::COMMA, CHECK_OK);
     }
   }
@@ skipping 81 matching lines @@
   ParseIdentifier(kAllowEvalOrArguments, CHECK_OK);
   ParseArguments(ok);
 
   return Expression::Default();
 }
 
 #undef CHECK_OK
 
 
 void PreParser::LogSymbol() {
-  int identifier_pos = position();
-  if (scanner()->is_literal_one_byte()) {
-    log_->LogAsciiSymbol(identifier_pos, scanner()->literal_one_byte_string());
-  } else {
-    log_->LogUtf16Symbol(identifier_pos, scanner()->literal_utf16_string());
-  }
+  scanner()->LogSymbol(log_, position());
 }
 
 
 } }  // v8::internal