The HTML parser synchronously creates custom elements

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

Index: third_party/WebKit/Source/core/html/parser/HTMLParserReentryPermit.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLParserReentryPermit.cpp b/third_party/WebKit/Source/core/html/parser/HTMLParserReentryPermit.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..dc6091007cb4cab0683582f0164bb3bbf5cffe31
--- /dev/null
+++ b/third_party/WebKit/Source/core/html/parser/HTMLParserReentryPermit.cpp
@@ -0,0 +1,18 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/html/parser/HTMLParserReentryPermit.h"
+
+namespace blink {
+
+PassRefPtr<HTMLParserReentryPermit> HTMLParserReentryPermit::create()
+{
+    return adoptRef(new HTMLParserReentryPermit());
+}
+
+HTMLParserReentryPermit::HTMLParserReentryPermit()
+    : m_scriptNestingLevel(0)
+    , m_parserPauseFlag(false) {}
+
+} // namespace blink