Move ThreadableLoader to Oilpan heap (1/3)

third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp

 /*
  *  Copyright (C) 2004, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005-2007 Alexey Proskuryakov <ap@webkit.org>
  *  Copyright (C) 2007, 2008 Julien Chaffraix <jchaffraix@webkit.org>
  *  Copyright (C) 2008, 2011 Google Inc. All rights reserved.
  *  Copyright (C) 2012 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
@@ skipping 147 matching lines @@
     {
         m_xhr->didFinishLoadingFromBlob();
     }
     void didFail(FileError::ErrorCode error) override
     {
         m_xhr->didFailLoadingFromBlob();
     }
 
     void cancel()
     {
-        m_loader.cancel();
+        m_loader->cancel();
     }
 
     DEFINE_INLINE_TRACE()
     {
         visitor->trace(m_xhr);
     }
 
 private:
     BlobLoader(XMLHttpRequest* xhr, PassRefPtr<BlobDataHandle> handle)
         : m_xhr(xhr)
-        , m_loader(FileReaderLoader::ReadByClient, this)
+        , m_loader(FileReaderLoader::create(FileReaderLoader::ReadByClient, this))
     {
-        m_loader.start(m_xhr->getExecutionContext(), handle);
+        m_loader->start(m_xhr->getExecutionContext(), handle);
     }
 
     Member<XMLHttpRequest> m_xhr;
-    FileReaderLoader m_loader;
+    std::unique_ptr<FileReaderLoader> m_loader;
 };
 
 XMLHttpRequest* XMLHttpRequest::create(ScriptState* scriptState)
 {
     ExecutionContext* context = scriptState->getExecutionContext();
     DOMWrapperWorld& world = scriptState->world();
     RefPtr<SecurityOrigin> isolatedWorldSecurityOrigin = world.isIsolatedWorld() ? world.isolatedWorldSecurityOrigin() : nullptr;
     XMLHttpRequest* xmlHttpRequest = new XMLHttpRequest(context, isolatedWorldSecurityOrigin);
     xmlHttpRequest->suspendIfNeeded();
 
@@ skipping 1522 matching lines @@
 
 DEFINE_TRACE_WRAPPERS(XMLHttpRequest)
 {
     visitor->traceWrappers(m_responseBlob);
     visitor->traceWrappers(m_responseLegacyStream);
     visitor->traceWrappers(m_responseDocument);
     visitor->traceWrappers(m_responseArrayBuffer);
 }
 
 } // namespace blink