ES6 template literals should not use legacy octal strings

src/scanner.h

 // 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.
 
 #ifndef V8_SCANNER_H_
 #define V8_SCANNER_H_
 
 #include "src/allocation.h"
@@ skipping 659 matching lines @@
   void ScanDecimalDigits();
   Token::Value ScanNumber(bool seen_period);
   Token::Value ScanIdentifierOrKeyword();
   Token::Value ScanIdentifierSuffix(LiteralScope* literal);
 
   Token::Value ScanString();
 
   // Scans an escape-sequence which is part of a string and adds the
   // decoded character to the current literal. Returns true if a pattern
   // is scanned.
-  template <bool capture_raw>
+  template <bool capture_raw, bool in_template_literal>
   bool ScanEscape();
+
   // Decodes a Unicode escape-sequence which is part of an identifier.
   // If the escape sequence cannot be decoded the result is kBadChar.
   uc32 ScanIdentifierUnicodeEscape();
   // Helper for the above functions.
   template <bool capture_raw>
   uc32 ScanUnicodeEscape();
 
   Token::Value ScanTemplateSpan();
 
   // Return the current source position.
@@ skipping 44 matching lines @@
   bool harmony_classes_;
   // Whether we scan TEMPLATE_SPAN and TEMPLATE_TAIL
   bool harmony_templates_;
   // Whether we allow \u{xxxxx}.
   bool harmony_unicode_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCANNER_H_