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

third_party/WebKit/Source/modules/websockets/DOMWebSocket.h

 /*
  * Copyright (C) 2011 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 DOMWebSocket_h
 #define DOMWebSocket_h
 
+#include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/events/EventListener.h"
 #include "core/events/EventTarget.h"
 #include "modules/EventTargetModules.h"
 #include "modules/ModulesExport.h"
 #include "modules/websockets/WebSocketChannel.h"
 #include "modules/websockets/WebSocketChannelClient.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/Deque.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/text/WTFString.h"
 #include <stdint.h>
 
 namespace blink {
 
 class Blob;
 class DOMArrayBuffer;
 class DOMArrayBufferView;
 class ExceptionState;
 class ExecutionContext;
 class StringOrStringSequence;
 
-class MODULES_EXPORT DOMWebSocket : public RefCountedGarbageCollectedEventTargetWithInlineData<DOMWebSocket>, public ActiveDOMObject, public WebSocketChannelClient {
+class MODULES_EXPORT DOMWebSocket : public RefCountedGarbageCollectedEventTargetWithInlineData<DOMWebSocket>, public ActiveScriptWrappable, public ActiveDOMObject, public WebSocketChannelClient {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(DOMWebSocket);
     DEFINE_WRAPPERTYPEINFO();
     USING_GARBAGE_COLLECTED_MIXIN(DOMWebSocket);
 public:
     static const char* subprotocolSeperator();
     // DOMWebSocket instances must be used with a wrapper since this class's
     // lifetime management is designed assuming the V8 holds a ref on it while
     // hasPendingActivity() returns true.
     static DOMWebSocket* create(ExecutionContext*, const String& url, ExceptionState&);
     static DOMWebSocket* create(ExecutionContext*, const String& url, const StringOrStringSequence& protocols, ExceptionState&);
@@ skipping 36 matching lines @@
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(close);
 
     // EventTarget functions.
     const AtomicString& interfaceName() const override;
     ExecutionContext* getExecutionContext() const override;
 
     // ActiveDOMObject functions.
     void contextDestroyed() override;
-    // Prevent this instance from being collected while it's not in CLOSED
-    // state.
-    bool hasPendingActivity() const override;
     void suspend() override;
     void resume() override;
     void stop() override;
 
+    // ActiveScriptWrappable
+    // Prevent this instance from being collected while it's not in CLOSED
+    // state.
+    bool hasPendingActivity() const final;
+
     // WebSocketChannelClient functions.
     void didConnect(const String& subprotocol, const String& extensions) override;
     void didReceiveTextMessage(const String& message) override;
     void didReceiveBinaryMessage(PassOwnPtr<Vector<char>>) override;
     void didError() override;
     void didConsumeBufferedAmount(uint64_t) override;
     void didStartClosingHandshake() override;
     void didClose(ClosingHandshakeCompletionStatus, unsigned short code, const String& reason) override;
 
     DECLARE_VIRTUAL_TRACE();
@@ skipping 104 matching lines @@
     String m_subprotocol;
     String m_extensions;
 
     Member<EventQueue> m_eventQueue;
     Timer<DOMWebSocket> m_bufferedAmountConsumeTimer;
 };
 
 } // namespace blink
 
 #endif // DOMWebSocket_h