[modules] Disable HTML-like comments

src/parsing/scanner.h

Index: src/parsing/scanner.h
diff --git a/src/parsing/scanner.h b/src/parsing/scanner.h
index 0acc7ab019a1c7e033ec9160d905990b4419b1bf..e210307f417633b7161dd89e370fa36caef5ff1d 100644
--- a/src/parsing/scanner.h
+++ b/src/parsing/scanner.h
@@ -349,7 +349,7 @@ class Scanner {
 
   explicit Scanner(UnicodeCache* scanner_contants);
 
-  void Initialize(Utf16CharacterStream* source);
+  void Initialize(Utf16CharacterStream* source, bool allow_html_comments);
 
   // Returns the next token and advances input.
   Token::Value Next();
@@ -804,6 +804,11 @@ class Scanner {
   // Whether this scanner encountered an HTML comment.
   bool found_html_comment_;
 
+  // Whether this scanner should interpret character sequences describing HTML
+  // comments as JavaScript comment delimiters (as per ES2015 section B.1.3,
+  // "HTML-like Comments")
+  bool allow_html_comments_;
+
   bool allow_harmony_exponentiation_operator_;
 
   MessageTemplate::Template scanner_error_;