Reduce ActiveDOMObjects from core/

third_party/WebKit/Source/core/html/PublicURLManager.h

 /*
  * Copyright (C) 2012 Motorola Mobility Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT 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 PublicURLManager_h
 #define PublicURLManager_h
 
-#include "core/dom/ActiveDOMObject.h"
+#include "core/dom/ContextLifecycleObserver.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class KURL;
 class ExecutionContext;
 class SecurityOrigin;
 class URLRegistry;
 class URLRegistrable;
 
-class PublicURLManager final : public NoBaseWillBeGarbageCollectedFinalized<PublicURLManager>, public ActiveDOMObject {
+class PublicURLManager final : public NoBaseWillBeGarbageCollectedFinalized<PublicURLManager>, public ContextLifecycleObserver {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PublicURLManager);
     USING_FAST_MALLOC_WILL_BE_REMOVED(PublicURLManager);
 public:
     static PassOwnPtrWillBeRawPtr<PublicURLManager> create(ExecutionContext*);
 
     void registerURL(SecurityOrigin*, const KURL&, URLRegistrable*, const String& uuid = String());
     void revoke(const KURL&);
     void revoke(const String& uuid);
 
     // ActiveDOMObject interface.
-    void stop() override;
+    void contextDestroyed() override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit PublicURLManager(ExecutionContext*);
 
     // One or more URLs can be associated with the same unique ID.
     // Objects need be revoked by unique ID in some cases.
     typedef String URLString;
     typedef HashMap<URLString, String> URLMap;
     typedef HashMap<URLRegistry*, URLMap> RegistryURLMap;
 
     RegistryURLMap m_registryToURL;
-    bool m_isStopped;
 };
 
 } // namespace blink
 
 #endif // PublicURLManager_h