[tracing] Support BACKGROUND mode in MemoryCache dump provider

third_party/WebKit/Source/core/fetch/ImageResource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007 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
@@ skipping 414 matching lines @@
         // As encoded image data can be created from m_image  (see
         // ImageResource::resourceBuffer(), we don't have to keep m_data. Let's
         // clear this. As for the lifetimes of m_image and m_data, see this
         // document:
         // https://docs.google.com/document/d/1v0yTAZ6wkqX2U_M6BNIGUJpM1s0TIw1VsqpxoL7aciY/edit?usp=sharing
         clearData();
     }
     Resource::finish(loadFinishTime);
 }
 
+void ImageResource::onMemoryDump(WebMemoryDumpLevelOfDetail levelOfDetail, WebProcessMemoryDump* memoryDump) const
+{
+    Resource::onMemoryDump(levelOfDetail, memoryDump);
+    const String name = getMemoryDumpName() + "/encoded_data";
+    if (m_image && !m_image->isNull())
+        m_image->data()->onMemoryDump(name, memoryDump);
+}
+
 void ImageResource::error(const ResourceError& error)
 {
     if (m_multipartParser)
         m_multipartParser->cancel();
     clear();
     Resource::error(error);
     notifyObservers();
 }
 
 void ImageResource::responseReceived(const ResourceResponse& response, std::unique_ptr<WebDataConsumerHandle> handle)
@@ skipping 140 matching lines @@
     if (response().wasFetchedViaServiceWorker())
         return response().serviceWorkerResponseType() != WebServiceWorkerResponseTypeOpaque;
     if (!getImage()->currentFrameHasSingleSecurityOrigin())
         return false;
     if (passesAccessControlCheck(securityOrigin))
         return true;
     return !securityOrigin->taintsCanvas(response().url());
 }
 
 } // namespace blink