ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/core/fileapi/FileReader.h

 /*
  * Copyright (C) 2010 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 32 matching lines @@
 #include <memory>
 
 namespace blink {
 
 class Blob;
 class ExceptionState;
 class ExecutionContext;
 class StringOrArrayBuffer;
 
 class CORE_EXPORT FileReader final : public EventTargetWithInlineData,
-                                     public ActiveScriptWrappable,
+                                     public ActiveScriptWrappable<FileReader>,
                                      public SuspendableObject,
                                      public FileReaderLoaderClient {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(FileReader);
 
  public:
   static FileReader* create(ExecutionContext*);
 
   ~FileReader() override;
 
@@ skipping 31 matching lines @@
   DEFINE_ATTRIBUTE_EVENT_LISTENER(loadstart);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(progress);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(load);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(abort);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(loadend);
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
+  class ThrottlingController;
+
   explicit FileReader(ExecutionContext*);
 
-  class ThrottlingController;
-
   void terminate();
   void readInternal(Blob*, FileReaderLoader::ReadType, ExceptionState&);
   void fireEvent(const AtomicString& type);
 
   void executePendingRead();
 
   ReadyState m_state;
 
   // Internal loading state, which could differ from ReadyState as it's
   // for script-visible state while this one's for internal state.
@@ skipping 12 matching lines @@
   String m_encoding;
 
   std::unique_ptr<FileReaderLoader> m_loader;
   Member<DOMException> m_error;
   double m_lastProgressNotificationTimeMS;
 };
 
 }  // namespace blink
 
 #endif  // FileReader_h