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diff --git a/Source/WebKit2/WebProcess/WebPage/WebInspectorUI.h b/Source/WebKit2/WebProcess/WebPage/WebInspectorUI.h
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+++ b/Source/WebKit2/WebProcess/WebPage/WebInspectorUI.h
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+/*
+ * Copyright (C) 2014-2016 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 "Connection.h"
+#include "WebInspectorFrontendAPIDispatcher.h"
+#include <WebCore/InspectorFrontendClient.h>
+#include <WebCore/InspectorFrontendHost.h>
+
+namespace WebCore {
+class InspectorController;
+}
+
+namespace WebKit {
+
+class WebPage;
+
+class WebInspectorUI : public RefCounted<WebInspectorUI>, public IPC::Connection::Client, public WebCore::InspectorFrontendClient {
+public:
+    static Ref<WebInspectorUI> create(WebPage&);
+
+    // Implemented in generated WebInspectorUIMessageReceiver.cpp
+    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
+
+    // IPC::Connection::Client
+    void didClose(IPC::Connection&) override { closeWindow(); }
+    void didReceiveInvalidMessage(IPC::Connection&, IPC::StringReference, IPC::StringReference) override { closeWindow(); }
+
+    // Called by WebInspectorUI messages
+    void establishConnection(IPC::Attachment connectionIdentifier, uint64_t inspectedPageIdentifier, bool underTest, unsigned inspectionLevel);
+
+    void showConsole();
+    void showResources();
+    void showTimelines();
+
+    void showMainResourceForFrame(const String& frameIdentifier);
+
+    void startPageProfiling();
+    void stopPageProfiling();
+
+    void startElementSelection();
+    void stopElementSelection();
+
+    void attachedBottom() { setDockSide(DockSide::Bottom); }
+    void attachedRight() { setDockSide(DockSide::Right); }
+    void attachedLeft() { setDockSide(DockSide::Left); }
+    void detached() { setDockSide(DockSide::Undocked); }
+
+    void setDockSide(DockSide);
+    void setDockingUnavailable(bool);
+
+    void setIsVisible(bool);
+
+    void didSave(const String& url);
+    void didAppend(const String& url);
+
+    void sendMessageToFrontend(const String&);
+
+    // WebCore::InspectorFrontendClient
+    void windowObjectCleared() override;
+    void frontendLoaded() override;
+
+    void startWindowDrag() override;
+    void moveWindowBy(float x, float y) override;
+
+    String localizedStringsURL() override;
+
+    void bringToFront() override;
+    void closeWindow() override;
+
+    WebCore::UserInterfaceLayoutDirection userInterfaceLayoutDirection() const override;
+
+    void requestSetDockSide(DockSide) override;
+    void changeAttachedWindowHeight(unsigned) override;
+    void changeAttachedWindowWidth(unsigned) override;
+
+    void openInNewTab(const String& url) override;
+
+    bool canSave() override;
+    void save(const WTF::String& url, const WTF::String& content, bool base64Encoded, bool forceSaveAs) override;
+    void append(const WTF::String& url, const WTF::String& content) override;
+
+    void inspectedURLChanged(const String&) override;
+
+    void sendMessageToBackend(const String&) override;
+
+    void pagePaused() override;
+    void pageUnpaused() override;
+
+    bool isUnderTest() override { return m_underTest; }
+    unsigned inspectionLevel() const override { return m_inspectionLevel; }
+
+private:
+    explicit WebInspectorUI(WebPage&);
+
+    WebPage& m_page;
+    WebInspectorFrontendAPIDispatcher m_frontendAPIDispatcher;
+    RefPtr<WebCore::InspectorFrontendHost> m_frontendHost;
+    RefPtr<IPC::Connection> m_backendConnection;
+
+    // Keep a pointer to the frontend's inspector controller rather than going through
+    // corePage(), since we may need it after the frontend's page has started destruction.
+    WebCore::InspectorController* m_frontendController { nullptr };
+
+    uint64_t m_inspectedPageIdentifier { 0 };
+    bool m_underTest { false };
+    bool m_dockingUnavailable { false };
+    bool m_isVisible { false };
+    DockSide m_dockSide { DockSide::Undocked };
+    unsigned m_inspectionLevel { 1 };
+};
+
+} // namespace WebKit