Add EventHandlerRegistry

Source/core/dom/DocumentLifecycleNotifier.h

Index: Source/core/dom/DocumentLifecycleNotifier.h
diff --git a/Source/core/dom/DocumentLifecycleNotifier.h b/Source/core/dom/DocumentLifecycleNotifier.h
index f8a9f99ae5b40aa4e68b7a97e762b68e04e4bb21..b4024bbcccce6d9acf4e95d74f203ee7d0979738 100644
--- a/Source/core/dom/DocumentLifecycleNotifier.h
+++ b/Source/core/dom/DocumentLifecycleNotifier.h
@@ -38,6 +38,7 @@ class DocumentLifecycleNotifier : public LifecycleNotifier<Document> {
 public:
     static PassOwnPtr<DocumentLifecycleNotifier> create(Document*);
 
+    void notifyDocumentWasAttached();
     void notifyDocumentWasDetached();
     void notifyDocumentWasDisposed();
 
@@ -56,6 +57,13 @@ inline PassOwnPtr<DocumentLifecycleNotifier> DocumentLifecycleNotifier::create(D
     return adoptPtr(new DocumentLifecycleNotifier(document));
 }
 
+inline void DocumentLifecycleNotifier::notifyDocumentWasAttached()
+{
+    TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDocumentObservers);
+    for (DocumentObserverSet::iterator i = m_documentObservers.begin(); i != m_documentObservers.end(); ++i)
+        (*i)->documentWasAttached();
+}
+
 inline void DocumentLifecycleNotifier::notifyDocumentWasDetached()
 {
     TemporaryChange<IterationType> scope(this->m_iterating, IteratingOverDocumentObservers);