[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/filesystem/FileWriter.h

 /*
  * Copyright (C) 2010 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * 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 FileWriter_h
 #define FileWriter_h
 
+#include "bindings/core/v8/V8GCRoot.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/fileapi/FileError.h"
 #include "modules/EventTargetModules.h"
 #include "modules/filesystem/FileWriterBase.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebFileWriterClient.h"
 
 namespace blink {
 
 class Blob;
 class ExceptionState;
 class ExecutionContext;
 
 class FileWriter final
 #if ENABLE(OILPAN)
     : public EventTargetWithInlineData
     , public FileWriterBase
 #else
     : public FileWriterBase
     , public EventTargetWithInlineData
 #endif
     , public ActiveDOMObject
-    , public WebFileWriterClient {
+    , public WebFileWriterClient
+    , public V8GCRoot {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(FileWriterBase);
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(FileWriter);
 public:
     static FileWriter* create(ExecutionContext*);
     ~FileWriter() override;
 
     enum ReadyState {
         INIT = 0,
         WRITING = 1,
@@ skipping 59 matching lines @@
     long long m_numAborts;
     long long m_recursionDepth;
     double m_lastProgressNotificationTimeMS;
     Member<Blob> m_blobBeingWritten;
     int m_asyncOperationId;
 };
 
 } // namespace blink
 
 #endif // FileWriter_h