The HTML parser synchronously creates custom elements

third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.h

Index: third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.h
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.h b/third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.h
index 3d66162365083b93aed2797769a1bb8b6aa8e4de..4b16d91e888e85f82f56806486b88bc63d879421 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.h
+++ b/third_party/WebKit/Source/core/html/parser/HTMLConstructionSite.h
@@ -31,6 +31,7 @@
 #include "core/dom/ParserContentPolicy.h"
 #include "core/html/parser/HTMLElementStack.h"
 #include "core/html/parser/HTMLFormattingElementList.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
@@ -101,15 +102,17 @@ enum FlushMode {
 };
 
 class AtomicHTMLToken;
+class CustomElementDefinition;
 class Document;
 class Element;
 class HTMLFormElement;
+class HTMLParserReentryPermit;
 
 class HTMLConstructionSite final {
     WTF_MAKE_NONCOPYABLE(HTMLConstructionSite);
     DISALLOW_NEW();
 public:
-    HTMLConstructionSite(Document&, ParserContentPolicy);
+    HTMLConstructionSite(HTMLParserReentryPermit*, Document&, ParserContentPolicy);
     ~HTMLConstructionSite();
     DECLARE_TRACE();
 
@@ -243,6 +246,9 @@ private:
     void executeTask(HTMLConstructionSiteTask&);
     void queueTask(const HTMLConstructionSiteTask&);
 
+    CustomElementDefinition* lookUpCustomElementDefinition(Document&, AtomicHTMLToken*);
+
+    Member<HTMLParserReentryPermit> m_reentryPermit;
     Member<Document> m_document;
 
     // This is the root ContainerNode to which the parser attaches all newly