Parser: Make skipping HTML comments optional.

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index dbd8f1110108fdb17edd89958105f848e040e167..a795a0377daab3faed25b37f55d04777cade5a8e 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -121,6 +121,10 @@ class ParseInfo {
   uint32_t hash_seed() { return hash_seed_; }
   void set_hash_seed(uint32_t hash_seed) { hash_seed_ = hash_seed; }
 
+  bool ignore_html_comments() const {
+    return script_.is_null() || script_->origin_options().IsSkipHtmlComments();
+  }
+
   //--------------------------------------------------------------------------
   // TODO(titzer): these should not be part of ParseInfo.
   //--------------------------------------------------------------------------