[WIP] Custom element upgrades

third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.h

Index: third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.h b/third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.h
index 6f864dc9615d1831e7b82113e761f5cd9fdd7a3f..ea1a00d2ffc7494b79031dbf039fde07784daca4 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.h
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.h
@@ -6,16 +6,17 @@
 #define ScriptCustomElementDefinition_h
 
 #include "bindings/core/v8/ScopedPersistent.h"
+#include "bindings/core/v8/ScriptState.h"
 #include "core/CoreExport.h"
 #include "core/dom/custom/CustomElementDefinition.h"
 #include "v8.h"
 #include "wtf/Noncopyable.h"
+#include "wtf/RefPtr.h"
 
 namespace blink {
 
 class CustomElementDescriptor;
 class CustomElementsRegistry;
-class ScriptState;
 
 class CORE_EXPORT ScriptCustomElementDefinition final :
     public CustomElementDefinition {
@@ -33,6 +34,12 @@ public:
         const v8::Local<v8::Object>& constructor,
         const v8::Local<v8::Object>& prototype);
 
+    virtual ~ScriptCustomElementDefinition() = default;
+
+    // TODO(dominicc): Move this to a command object suitable for a
+    // reaction queue.
+    bool upgrade(Element*) override;
+
     v8::Local<v8::Object> constructor(ScriptState*) const;
     v8::Local<v8::Object> prototype(ScriptState*) const;
 
@@ -43,6 +50,7 @@ private:
         const v8::Local<v8::Object>& constructor,
         const v8::Local<v8::Object>& prototype);
 
+    RefPtr<ScriptState> m_scriptState;
     ScopedPersistent<v8::Object> m_constructor;
     ScopedPersistent<v8::Object> m_prototype;
 };