Revert of Don't lower priority for scripts inserted by doc.write

third_party/WebKit/Source/core/html/parser/BackgroundHTMLParser.cpp

 /*
  * Copyright (C) 2013 Google, Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 82 matching lines @@
       std::move(config), std::move(loading_task_runner));
   return background_parser->weak_factory_.CreateWeakPtr();
 }
 
 void BackgroundHTMLParser::Init(
     const KURL& document_url,
     std::unique_ptr<CachedDocumentParameters> cached_document_parameters,
     const MediaValuesCached::MediaValuesCachedData& media_values_cached_data) {
   preload_scanner_.reset(new TokenPreloadScanner(
       document_url, std::move(cached_document_parameters),
-      media_values_cached_data,
-      TokenPreloadScanner::ScannerType::kMainDocument));
+      media_values_cached_data));
 }
 
 BackgroundHTMLParser::Configuration::Configuration()
     : outstanding_token_limit(kDefaultOutstandingTokenLimit),
       pending_token_limit(kDefaultPendingTokenLimit),
       should_coalesce_chunks(false) {}
 
 BackgroundHTMLParser::BackgroundHTMLParser(
     std::unique_ptr<Configuration> config,
     RefPtr<WebTaskRunner> loading_task_runner)
@@ skipping 265 matching lines @@
   if (IsMainThread()) {
     (*WTF::Bind(function, std::forward<Ps>(parameters)...))();
   } else {
     loading_task_runner_->PostTask(
         BLINK_FROM_HERE,
         CrossThreadBind(function, std::forward<Ps>(parameters)...));
   }
 }
 
 }  // namespace blink