Get rid of PreParserIdentifier.

src/scanner.cc

 // Copyright 2011 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.
 
 // Features shared by parsing and pre-parsing scanners.
 
 #include <stdint.h>
 
 #include <cmath>
 
@@ skipping 1140 matching lines @@
           (keyword_length <= 9 || input[9] == keyword[9])) {  \
         return token;                                         \
       }                                                       \
     }
     KEYWORDS(KEYWORD_GROUP_CASE, KEYWORD)
   }
   return Token::IDENTIFIER;
 }
 
 
+bool Scanner::IdentifierIsFutureReserved(const AstRawString* string) const {
+  return Token::FUTURE_RESERVED_WORD ==
+         KeywordOrIdentifierToken(string->raw_data(), string->length(),
+                                  harmony_scoping_, harmony_modules_,
+                                  harmony_classes_);
+}
+
+
 bool Scanner::IdentifierIsFutureStrictReserved(
     const AstRawString* string) const {
   // Keywords are always 1-byte strings.
   if (!string->is_one_byte()) return false;
   if (string->IsOneByteEqualTo("let") || string->IsOneByteEqualTo("static") ||
       string->IsOneByteEqualTo("yield")) {
     return true;
   }
   return Token::FUTURE_STRICT_RESERVED_WORD ==
          KeywordOrIdentifierToken(string->raw_data(), string->length(),
@@ skipping 316 matching lines @@
     }
     backing_store_.Add(static_cast<uint8_t>((one_byte_length >> 7) | 0x80u));
   }
   backing_store_.Add(static_cast<uint8_t>(one_byte_length & 0x7f));
 
   backing_store_.AddBlock(bytes);
   return backing_store_.EndSequence().start();
 }
 
 } }  // namespace v8::internal