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diff --git a/Source/WebKit2/UIProcess/WebNavigationState.h b/Source/WebKit2/UIProcess/WebNavigationState.h
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+/*
+ * Copyright (C) 2015 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 WebNavigationState_h
+#define WebNavigationState_h
+
+#include <wtf/HashMap.h>
+#include <wtf/Ref.h>
+
+namespace API {
+class Navigation;
+}
+
+namespace WebCore {
+class ResourceRequest;
+}
+
+namespace WebKit {
+
+class WebPageProxy;
+class WebBackForwardListItem;
+
+class WebNavigationState {
+public:
+    explicit WebNavigationState();
+    ~WebNavigationState();
+
+    Ref<API::Navigation> createBackForwardNavigation();
+    Ref<API::Navigation> createLoadRequestNavigation(const WebCore::ResourceRequest&);
+    Ref<API::Navigation> createReloadNavigation();
+    Ref<API::Navigation> createLoadDataNavigation();
+
+    API::Navigation& navigation(uint64_t navigationID);
+    Ref<API::Navigation> takeNavigation(uint64_t navigationID);
+    void didDestroyNavigation(uint64_t navigationID);
+    void clearAllNavigations();
+
+    uint64_t generateNavigationID()
+    {
+        return ++m_navigationID;
+    }
+
+private:
+    HashMap<uint64_t, RefPtr<API::Navigation>> m_navigations;
+    uint64_t m_navigationID { 0 };
+};
+
+} // namespace WebKit
+
+#endif // WebNavigationState_h