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diff --git a/Source/WebKit2/UIProcess/API/APILoaderClient.h b/Source/WebKit2/UIProcess/API/APILoaderClient.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 APILoaderClient_h
+#define APILoaderClient_h
+
+#include "APIData.h"
+#include "PluginModuleInfo.h"
+#include "SameDocumentNavigationType.h"
+#include <WebCore/FrameLoaderTypes.h>
+#include <WebCore/LayoutMilestones.h>
+#include <wtf/Forward.h>
+
+namespace WebCore {
+class ResourceError;
+}
+
+namespace WebKit {
+class AuthenticationChallengeProxy;
+class QuickLookDocumentData;
+class WebBackForwardListItem;
+class WebFrameProxy;
+class WebPageProxy;
+class WebProtectionSpace;
+struct WebNavigationDataStore;
+}
+
+namespace API {
+
+class Dictionary;
+class Navigation;
+class Object;
+
+class LoaderClient {
+public:
+    virtual ~LoaderClient() { }
+
+    virtual void didStartProvisionalLoadForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Navigation*, API::Object*) { }
+    virtual void didReceiveServerRedirectForProvisionalLoadForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Navigation*, API::Object*) { }
+    virtual void didFailProvisionalLoadWithErrorForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Navigation*, const WebCore::ResourceError&, API::Object*) { }
+    virtual void didCommitLoadForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Navigation*, API::Object*) { }
+    virtual void didFinishDocumentLoadForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Navigation*, API::Object*) { }
+    virtual void didFinishLoadForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Navigation*, API::Object*) { }
+    virtual void didFailLoadWithErrorForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Navigation*, const WebCore::ResourceError&, API::Object*) { }
+    virtual void didSameDocumentNavigationForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Navigation*, WebKit::SameDocumentNavigationType, API::Object*) { }
+    virtual void didReceiveTitleForFrame(WebKit::WebPageProxy&, const WTF::String&, WebKit::WebFrameProxy&, API::Object*) { }
+    virtual void didFirstLayoutForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Object*) { }
+
+    // FIXME: We should consider removing didFirstVisuallyNonEmptyLayoutForFrame since it is replaced by didLayout.
+    virtual void didFirstVisuallyNonEmptyLayoutForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Object*) { }
+
+    virtual void didDisplayInsecureContentForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Object*) { }
+    virtual void didRunInsecureContentForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Object*) { }
+    virtual void didDetectXSSForFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, API::Object*) { }
+
+    virtual void didLayout(WebKit::WebPageProxy&, WebCore::LayoutMilestones) { }
+    
+    virtual bool canAuthenticateAgainstProtectionSpaceInFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, WebKit::WebProtectionSpace*) { return false; }
+    virtual void didReceiveAuthenticationChallengeInFrame(WebKit::WebPageProxy&, WebKit::WebFrameProxy&, WebKit::AuthenticationChallengeProxy*) { }
+
+    virtual void didStartProgress(WebKit::WebPageProxy&) { }
+    virtual void didChangeProgress(WebKit::WebPageProxy&) { }
+    virtual void didFinishProgress(WebKit::WebPageProxy&) { }
+
+    // FIXME: These functions should not be part of this client.
+    virtual void processDidBecomeUnresponsive(WebKit::WebPageProxy&) { }
+    virtual void processDidBecomeResponsive(WebKit::WebPageProxy&) { }
+    virtual void processDidCrash(WebKit::WebPageProxy&) { }
+
+    virtual void didChangeBackForwardList(WebKit::WebPageProxy&, WebKit::WebBackForwardListItem*, Vector<RefPtr<WebKit::WebBackForwardListItem>>) { }
+    virtual bool shouldKeepCurrentBackForwardListItemInList(WebKit::WebPageProxy&, WebKit::WebBackForwardListItem*) { return true; }
+    virtual void willGoToBackForwardListItem(WebKit::WebPageProxy&, WebKit::WebBackForwardListItem*, API::Object*) { }
+
+    virtual RefPtr<Data> webCryptoMasterKey(WebKit::WebPageProxy&) { return nullptr; }
+
+    virtual void didNavigateWithNavigationData(WebKit::WebPageProxy&, const WebKit::WebNavigationDataStore&, WebKit::WebFrameProxy&) { }
+    virtual void didPerformClientRedirect(WebKit::WebPageProxy&, const WTF::String&, const WTF::String&, WebKit::WebFrameProxy&) { }
+    virtual void didPerformServerRedirect(WebKit::WebPageProxy&, const WTF::String&, const WTF::String&, WebKit::WebFrameProxy&) { }
+    virtual void didUpdateHistoryTitle(WebKit::WebPageProxy&, const WTF::String&, const WTF::String&, WebKit::WebFrameProxy&) { }
+
+    virtual void navigationGestureDidBegin(WebKit::WebPageProxy&) { }
+    virtual void navigationGestureWillEnd(WebKit::WebPageProxy&, bool willNavigate, WebKit::WebBackForwardListItem&) { }
+    virtual void navigationGestureDidEnd(WebKit::WebPageProxy&, bool willNavigate, WebKit::WebBackForwardListItem&) { }
+
+#if ENABLE(NETSCAPE_PLUGIN_API)
+    virtual WebKit::PluginModuleLoadPolicy pluginLoadPolicy(WebKit::WebPageProxy&, WebKit::PluginModuleLoadPolicy currentPluginLoadPolicy, API::Dictionary*, WTF::String& /* unavailabilityDescription */) { return currentPluginLoadPolicy; }
+    virtual void didFailToInitializePlugin(WebKit::WebPageProxy&, API::Dictionary*) { }
+    virtual void didBlockInsecurePluginVersion(WebKit::WebPageProxy&, API::Dictionary*) { }
+#endif // ENABLE(NETSCAPE_PLUGIN_API)
+
+#if ENABLE(WEBGL)
+    virtual WebCore::WebGLLoadPolicy webGLLoadPolicy(WebKit::WebPageProxy&, const WTF::String&) const { return WebCore::WebGLLoadPolicy::WebGLAllowCreation; }
+    virtual WebCore::WebGLLoadPolicy resolveWebGLLoadPolicy(WebKit::WebPageProxy&, const WTF::String&) const { return WebCore::WebGLLoadPolicy::WebGLAllowCreation; }
+#endif // ENABLE(WEBGL)
+
+#if USE(QUICK_LOOK)
+    virtual void didStartLoadForQuickLookDocumentInMainFrame(const WTF::String& fileName, const WTF::String& uti) { }
+    virtual void didFinishLoadForQuickLookDocumentInMainFrame(const WebKit::QuickLookDocumentData&) { }
+#endif
+};
+
+} // namespace API
+
+#endif // APILoaderClient_h