tracing: Report ResourceClients and the reason for not deletable for web-caches

third_party/WebKit/Source/core/html/ImageDocument.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 53 matching lines @@
 
     void createDocumentStructure(bool loadingMultipartContent);
 
     // These methods are for m_shrinkToFitMode == Desktop.
     void resizeImageToFit(ScaleType);
     void restoreImageSize(ScaleType);
     bool imageFitsInWindow() const;
     bool shouldShrinkToFit() const;
     float scale() const;
 
+    String debugName() const override { return "ImageDocument"; }
+
     RefPtrWillBeMember<HTMLImageElement> m_imageElement;
 
     // Whether enough of the image has been loaded to determine its size
     bool m_imageSizeIsKnown;
 
     // Whether the image is shrunk to fit or not
     bool m_didShrinkImage;
 
     // Whether the image should be shrunk or not
     bool m_shouldShrinkImage;
 
     enum ShrinkToFitMode {
         Viewport,
         Desktop
     };
     ShrinkToFitMode m_shrinkToFitMode;
 };
 
 DEFINE_DOCUMENT_TYPE_CASTS(ImageDocument);
 
 }
 
 #endif // ImageDocument_h