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diff --git a/Source/WebKit2/UIProcess/VisitedLinkStore.h b/Source/WebKit2/UIProcess/VisitedLinkStore.h
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+++ b/Source/WebKit2/UIProcess/VisitedLinkStore.h
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+/*
+ * Copyright (C) 2010 Apple 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:
+ * 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 INC. 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 INC. 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 VisitedLinkStore_h
+#define VisitedLinkStore_h
+
+#include "APIObject.h"
+#include "MessageReceiver.h"
+#include "VisitedLinkTable.h"
+#include "WebProcessLifetimeObserver.h"
+#include <WebCore/LinkHash.h>
+#include <wtf/Forward.h>
+#include <wtf/HashSet.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RunLoop.h>
+
+namespace WebKit {
+
+class WebPageProxy;
+class WebProcessProxy;
+    
+class VisitedLinkStore final : public API::ObjectImpl<API::Object::Type::VisitedLinkStore>, private IPC::MessageReceiver, public WebProcessLifetimeObserver {
+public:
+    static Ref<VisitedLinkStore> create();
+
+    explicit VisitedLinkStore();
+    virtual ~VisitedLinkStore();
+
+    uint64_t identifier() const { return m_identifier; }
+
+    void addProcess(WebProcessProxy&);
+    void removeProcess(WebProcessProxy&);
+
+    void addVisitedLinkHash(WebCore::LinkHash);
+    void removeAll();
+
+private:
+    // IPC::MessageReceiver
+    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
+
+    // WebProcessLifetimeObserver
+    void webProcessWillOpenConnection(WebProcessProxy&, IPC::Connection&) override;
+    void webProcessDidCloseConnection(WebProcessProxy&, IPC::Connection&) override;
+
+    void addVisitedLinkHashFromPage(uint64_t pageID, WebCore::LinkHash);
+
+    void pendingVisitedLinksTimerFired();
+
+    void resizeTable(unsigned newTableSize);
+    void sendTable(WebProcessProxy&);
+
+    HashSet<WebProcessProxy*> m_processes;
+
+    uint64_t m_identifier;
+
+    unsigned m_keyCount;
+    unsigned m_tableSize;
+    VisitedLinkTable m_table;
+
+    HashSet<WebCore::LinkHash, WebCore::LinkHashHash> m_pendingVisitedLinks;
+    RunLoop::Timer<VisitedLinkStore> m_pendingVisitedLinksTimer;
+};
+
+} // namespace WebKit
+
+#endif // VisitedLinkStore_h