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diff --git a/Source/WebKit2/UIProcess/WebPasteboardProxy.h b/Source/WebKit2/UIProcess/WebPasteboardProxy.h
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+++ b/Source/WebKit2/UIProcess/WebPasteboardProxy.h
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+/*
+ * Copyright (C) 2014 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 WebPasteboardProxy_h
+#define WebPasteboardProxy_h
+
+#include "MessageReceiver.h"
+#include "SharedMemory.h"
+#include <wtf/Forward.h>
+#include <wtf/HashSet.h>
+#include <wtf/NeverDestroyed.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+class Color;
+struct PasteboardImage;
+struct PasteboardWebContent;
+}
+
+namespace WebKit {
+
+class WebFrameProxy;
+class WebProcessProxy;
+struct WebSelectionData;
+
+class WebPasteboardProxy : public IPC::MessageReceiver {
+    WTF_MAKE_NONCOPYABLE(WebPasteboardProxy);
+    friend class LazyNeverDestroyed<WebPasteboardProxy>;
+public:
+    static WebPasteboardProxy& singleton();
+
+    void addWebProcessProxy(WebProcessProxy&);
+    void removeWebProcessProxy(WebProcessProxy&);
+
+#if PLATFORM(GTK)
+    void setPrimarySelectionOwner(WebFrameProxy*);
+    void didDestroyFrame(WebFrameProxy*);
+#endif
+
+private:
+    WebPasteboardProxy();
+    
+    typedef HashSet<WebProcessProxy*> WebProcessProxyList;
+
+    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
+    void didReceiveSyncMessage(IPC::Connection&, IPC::Decoder&, std::unique_ptr<IPC::Encoder>&) override;
+
+#if PLATFORM(IOS)
+    void writeWebContentToPasteboard(const WebCore::PasteboardWebContent&, const String& pasteboardName);
+    void writeImageToPasteboard(const WebCore::PasteboardImage&, const String& pasteboardName);
+    void writeStringToPasteboard(const String& pasteboardType, const String&, const String& pasteboardName);
+    void readStringFromPasteboard(uint64_t index, const String& pasteboardType, const String& pasteboardName, WTF::String&);
+    void readURLFromPasteboard(uint64_t index, const String& pasteboardType, const String& pasteboardName, String&);
+    void readBufferFromPasteboard(uint64_t index, const String& pasteboardType, const String& pasteboardName, SharedMemory::Handle&, uint64_t& size);
+    void getPasteboardItemsCount(const String& pasteboardName, uint64_t& itemsCount);
+#endif
+#if PLATFORM(COCOA)
+    void getPasteboardTypes(const String& pasteboardName, Vector<String>& pasteboardTypes);
+    void getPasteboardPathnamesForType(const String& pasteboardName, const String& pasteboardType, Vector<String>& pathnames);
+    void getPasteboardStringForType(const String& pasteboardName, const String& pasteboardType, String&);
+    void getPasteboardBufferForType(const String& pasteboardName, const String& pasteboardType, SharedMemory::Handle&, uint64_t& size);
+    void pasteboardCopy(const String& fromPasteboard, const String& toPasteboard, uint64_t& newChangeCount);
+    void getPasteboardChangeCount(const String& pasteboardName, uint64_t& changeCount);
+    void getPasteboardUniqueName(String& pasteboardName);
+    void getPasteboardColor(const String& pasteboardName, WebCore::Color&);
+    void getPasteboardURL(const String& pasteboardName, WTF::String&);
+    void addPasteboardTypes(const String& pasteboardName, const Vector<String>& pasteboardTypes, uint64_t& newChangeCount);
+    void setPasteboardTypes(const String& pasteboardName, const Vector<String>& pasteboardTypes, uint64_t& newChangeCount);
+    void setPasteboardPathnamesForType(IPC::Connection&, const String& pasteboardName, const String& pasteboardType, const Vector<String>& pathnames, uint64_t& newChangeCount);
+    void setPasteboardStringForType(const String& pasteboardName, const String& pasteboardType, const String&, uint64_t& newChangeCount);
+    void setPasteboardBufferForType(const String& pasteboardName, const String& pasteboardType, const SharedMemory::Handle&, uint64_t size, uint64_t& newChangeCount);
+#endif
+#if PLATFORM(GTK)
+    void writeToClipboard(const String& pasteboardName, const WebSelectionData&);
+    void readFromClipboard(const String& pasteboardName, WebSelectionData&);
+
+    WebFrameProxy* m_primarySelectionOwner { nullptr };
+    WebFrameProxy* m_frameWritingToClipboard { nullptr };
+#endif // PLATFORM(GTK)
+    
+    WebProcessProxyList m_webProcessProxyList;
+};
+
+} // namespace WebKit
+
+#endif // WebPasteboardProxy_h