Allow escape sequences in Constructor/Prototype tokens in PreParserTraits::GetSymbol()

src/scanner.h

Index: src/scanner.h
diff --git a/src/scanner.h b/src/scanner.h
index 356c8e4a549b0e41b753ab95db4891f164e0bc3d..52d6ab87bea56ce6fe461530eb9dc6d45483b0b5 100644
--- a/src/scanner.h
+++ b/src/scanner.h
@@ -384,16 +384,20 @@ class Scanner {
   const AstRawString* NextSymbol(AstValueFactory* ast_value_factory);
 
   double DoubleValue();
-  bool UnescapedLiteralMatches(const char* data, int length) {
+  bool LiteralMatches(const char* data, int length, bool allow_escapes = true) {
     if (is_literal_one_byte() &&
         literal_length() == length &&
-        !literal_contains_escapes()) {
+        (allow_escapes || !literal_contains_escapes())) {
       const char* token =
           reinterpret_cast<const char*>(literal_one_byte_string().start());
       return !strncmp(token, data, length);
     }
     return false;
   }
+  inline bool UnescapedLiteralMatches(const char* data, int length) {
+    return LiteralMatches(data, length, false);
+  }
+
   void IsGetOrSet(bool* is_get, bool* is_set) {
     if (is_literal_one_byte() &&
         literal_length() == 3 &&