Remove more oilpan.

sky/engine/core/loader/ImageLoader.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 19 matching lines @@
 #include "wtf/HashSet.h"
 #include "wtf/WeakPtr.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class IncrementLoadEventDelayCount;
 class FetchRequest;
 class Document;
 
-class ImageLoaderClient : public DummyBase<void> {
+class ImageLoaderClient {
 public:
     virtual void notifyImageSourceChanged() = 0;
 
     // Determines whether the observed ImageResource should have higher priority in the decoded resources cache.
     virtual bool requestsHighLiveResourceCachePriority() { return false; }
 
     virtual void trace(Visitor*) { }
 
 protected:
     ImageLoaderClient() { }
 };
 
 class Element;
 class ImageLoader;
 class RenderImageResource;
 
 template<typename T> class EventSender;
 typedef EventSender<ImageLoader> ImageEventSender;
 
-class ImageLoader : public DummyBase<ImageLoader>, public ImageResourceClient {
+class ImageLoader : public ImageResourceClient {
 public:
     explicit ImageLoader(Element*);
     virtual ~ImageLoader();
     void trace(Visitor*);
 
     enum LoadType {
         LoadNormally,
         ForceLoadImmediately
     };
 
@@ skipping 82 matching lines @@
     bool m_hasPendingLoadEvent : 1;
     bool m_hasPendingErrorEvent : 1;
     bool m_imageComplete : 1;
     bool m_elementIsProtected : 1;
     unsigned m_highPriorityClientCount;
 };
 
 }
 
 #endif