Implement custom element construction and some 'define' checks

third_party/WebKit/Source/core/dom/custom/V0CustomElementRegistrationContext.h

Index: third_party/WebKit/Source/core/dom/custom/V0CustomElementRegistrationContext.h
diff --git a/third_party/WebKit/Source/core/dom/custom/V0CustomElementRegistrationContext.h b/third_party/WebKit/Source/core/dom/custom/V0CustomElementRegistrationContext.h
index b3e41662c75cfc24399d164b98f21cd5c5c4278f..8ef3524bbeb9ad2b491e1163cfa5f6cfc2c359a6 100644
--- a/third_party/WebKit/Source/core/dom/custom/V0CustomElementRegistrationContext.h
+++ b/third_party/WebKit/Source/core/dom/custom/V0CustomElementRegistrationContext.h
@@ -40,6 +40,8 @@
 
 namespace blink {
 
+class ScriptState;
+
 class V0CustomElementRegistrationContext final : public GarbageCollectedFinalized<V0CustomElementRegistrationContext> {
 public:
     static V0CustomElementRegistrationContext* create()
@@ -51,7 +53,7 @@ public:
     void documentWasDetached() { m_registry.documentWasDetached(); }
 
     // Definitions
-    void registerElement(Document*, V0CustomElementConstructorBuilder*, const AtomicString& type, V0CustomElement::NameSet validNames, ExceptionState&);
+    void registerElement(ScriptState*, Document*, V0CustomElementConstructorBuilder*, const AtomicString& type, V0CustomElement::NameSet validNames, ExceptionState&);
 
     Element* createCustomTagElement(Document&, const QualifiedName&);
     static void setIsAttributeAndTypeExtension(Element*, const AtomicString& type);
@@ -59,6 +61,8 @@ public:
 
     void resolve(Element*, const V0CustomElementDescriptor&);
 
+    const V0CustomElementRegistry& registry() const { return m_registry; }
+
     DECLARE_TRACE();
 
 protected: