[v8 gc] Introduce a base class for all objects that can have pending activity

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

 /*
  * 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 184 matching lines @@
 };
 
 FileReader* FileReader::create(ExecutionContext* context)
 {
     FileReader* fileReader = new FileReader(context);
     fileReader->suspendIfNeeded();
     return fileReader;
 }
 
 FileReader::FileReader(ExecutionContext* context)
-    : ActiveDOMObject(context)
+    : ActiveScriptWrappable(this)
+    , ActiveDOMObject(context)
     , m_state(EMPTY)
     , m_loadingState(LoadingStateNone)
     , m_readType(FileReaderLoader::ReadAsBinaryString)
     , m_lastProgressNotificationTimeMS(0)
     , m_asyncOperationId(0)
 {
 }
 
 FileReader::~FileReader()
 {
@@ skipping 252 matching lines @@
 }
 
 DEFINE_TRACE(FileReader)
 {
     visitor->trace(m_error);
     RefCountedGarbageCollectedEventTargetWithInlineData<FileReader>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink