Oilpan: move custom element objects to the heap.

Source/core/html/imports/HTMLImportLoader.h

 /*
  * Copyright (C) 2013 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 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HTMLImportLoader_h
 #define HTMLImportLoader_h
 
 #include "core/fetch/RawResource.h"
 #include "core/fetch/ResourceOwner.h"
+#include "platform/heap/Handle.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class CustomElementMicrotaskQueue;
 class Document;
 class DocumentWriter;
 class HTMLImportChild;
@@ skipping 33 matching lines @@
 
     bool isDone() const { return m_state == StateLoaded || m_state == StateError; }
     bool hasError() const { return m_state == StateError; }
     bool shouldBlockScriptExecution() const;
 
     void importDestroyed();
     void startLoading(const ResourcePtr<RawResource>&);
     void didFinishParsing();
     void didRemoveAllPendingStylesheet();
 
-    PassRefPtr<CustomElementMicrotaskQueue> microtaskQueue() const;
+    PassRefPtrWillBeRawPtr<CustomElementMicrotaskQueue> microtaskQueue() const;
 
 private:
     HTMLImportLoader(HTMLImportsController*);
 
     // RawResourceClient
     virtual void responseReceived(Resource*, const ResourceResponse&) OVERRIDE;
     virtual void dataReceived(Resource*, const char* data, int length) OVERRIDE;
     virtual void notifyFinished(Resource*) OVERRIDE;
 
     State startWritingAndParsing(const ResourceResponse&);
     State finishWriting();
     State finishParsing();
     State finishLoading();
 
     void setState(State);
     void didFinishLoading();
     bool hasPendingResources() const;
     void clear();
 
     HTMLImportsController* m_controller;
     Vector<HTMLImportChild*> m_imports;
     State m_state;
     RefPtr<Document> m_importedDocument;
     RefPtr<DocumentWriter> m_writer;
-    RefPtr<CustomElementMicrotaskQueue> m_microtaskQueue;
+    RefPtrWillBePersistent<CustomElementMicrotaskQueue> m_microtaskQueue;
 };
 
 } // namespace WebCore
 
 #endif // HTMLImportLoader_h