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diff --git a/Source/WebKit2/UIProcess/RemoteWebInspectorProxy.h b/Source/WebKit2/UIProcess/RemoteWebInspectorProxy.h
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+++ b/Source/WebKit2/UIProcess/RemoteWebInspectorProxy.h
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+/*
+ * Copyright (C) 2016 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.
+ */
+
+#pragma once
+
+#include "APIObject.h"
+#include "MessageReceiver.h"
+#include <wtf/Forward.h>
+#include <wtf/HashMap.h>
+#include <wtf/RetainPtr.h>
+#include <wtf/text/WTFString.h>
+
+#if PLATFORM(MAC)
+OBJC_CLASS NSURL;
+OBJC_CLASS NSWindow;
+OBJC_CLASS WKRemoteWebInspectorProxyObjCAdapter;
+OBJC_CLASS WKWebInspectorWKWebView;
+#endif
+
+namespace WebKit {
+
+class WebPageProxy;
+
+class RemoteWebInspectorProxyClient {
+public:
+    virtual ~RemoteWebInspectorProxyClient() { }
+    virtual void sendMessageToBackend(const String& message) = 0;
+    virtual void closeFromFrontend() = 0;
+};
+
+class RemoteWebInspectorProxy : public RefCounted<RemoteWebInspectorProxy>, public IPC::MessageReceiver {
+public:
+    static Ref<RemoteWebInspectorProxy> create()
+    {
+        return adoptRef(*new RemoteWebInspectorProxy());
+    }
+
+    ~RemoteWebInspectorProxy();
+
+    void setClient(RemoteWebInspectorProxyClient* client) { m_client = client; }
+
+    void invalidate();
+
+    void load(const String& debuggableType, const String& backendCommandsURL);
+    void closeFromBackend();
+    void show();
+
+    void sendMessageToFrontend(const String& message);
+
+#if PLATFORM(MAC)
+    NSWindow *window() const { return m_window.get(); }
+    WKWebInspectorWKWebView *webView() const { return m_webView.get(); }
+#endif
+
+    void closeFromCrash();
+
+private:
+    RemoteWebInspectorProxy();
+
+    // IPC::MessageReceiver
+    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
+
+    // RemoteWebInspectorProxy messages.
+    void frontendDidClose();
+    void bringToFront();
+    void save(const String& filename, const String& content, bool base64Encoded, bool forceSaveAs);
+    void append(const String& filename, const String& content);
+    void startWindowDrag();
+    void openInNewTab(const String& url);
+    void sendMessageToBackend(const String& message);
+
+    void createFrontendPageAndWindow();
+    void closeFrontendPageAndWindow();
+
+    // Platform implementations.
+    WebPageProxy* platformCreateFrontendPageAndWindow();
+    void platformCloseFrontendPageAndWindow();
+    void platformBringToFront();
+    void platformSave(const String& filename, const String& content, bool base64Encoded, bool forceSaveAs);
+    void platformAppend(const String& filename, const String& content);
+    void platformStartWindowDrag();
+    void platformOpenInNewTab(const String& url);
+
+    RemoteWebInspectorProxyClient* m_client { nullptr };
+    WebPageProxy* m_inspectorPage { nullptr };
+
+#if PLATFORM(MAC)
+    RetainPtr<WKWebInspectorWKWebView> m_webView;
+    RetainPtr<NSWindow> m_window;
+    RetainPtr<WKRemoteWebInspectorProxyObjCAdapter> m_objCAdapter;
+    HashMap<String, RetainPtr<NSURL>> m_suggestedToActualURLMap;
+#endif
+};
+
+} // namespace WebKit