Fix detached event listener attribute updating.

third_party/WebKit/Source/core/events/EventListener.h

Index: third_party/WebKit/Source/core/events/EventListener.h
diff --git a/third_party/WebKit/Source/core/events/EventListener.h b/third_party/WebKit/Source/core/events/EventListener.h
index 03045cc1b10129802b8b39f17427aae73eb4718d..293362b9750ffce5bc9ed488e582947523c8dbdf 100644
--- a/third_party/WebKit/Source/core/events/EventListener.h
+++ b/third_party/WebKit/Source/core/events/EventListener.h
@@ -27,6 +27,7 @@
 
 namespace blink {
 
+class Document;
 class Event;
 class ExecutionContext;
 
@@ -46,9 +47,7 @@ class CORE_EXPORT EventListener
   virtual void handleEvent(ExecutionContext*, Event*) = 0;
   virtual const String& Code() const { return g_empty_string; }
   virtual bool WasCreatedFromMarkup() const { return false; }
-  virtual bool BelongsToTheCurrentWorld(ExecutionContext*) const {
-    return false;
-  }
+  virtual bool BelongsToTheCurrentWorld(Document*) const { return false; }
   virtual bool IsAttribute() const { return false; }
 
   ListenerType GetType() const { return type_; }