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diff --git a/Tools/TestWebKitAPI/Tests/WebKit2/UserMessage.cpp b/Tools/TestWebKitAPI/Tests/WebKit2/UserMessage.cpp
new file mode 100644
index 000000000..064cbb838
--- /dev/null
+++ b/Tools/TestWebKitAPI/Tests/WebKit2/UserMessage.cpp
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#include "config.h"
+
+#if WK_HAVE_C_SPI
+
+#include "Test.h"
+
+#include "PlatformUtilities.h"
+#include "PlatformWebView.h"
+
+namespace TestWebKitAPI {
+
+class WebKit2UserMessageRoundTripTest : public ::testing::Test {
+public:
+    WebKit2UserMessageRoundTripTest()
+        : didFinishLoad(false)
+        , didReceiveMessage(false)
+    {
+    }
+
+    WKRetainPtr<WKContextRef> context;
+    std::unique_ptr<PlatformWebView> webView;
+
+    WKRetainPtr<WKTypeRef> recievedBody;
+
+    bool didFinishLoad;
+    bool didReceiveMessage;
+
+    static void didReceiveMessageFromInjectedBundle(WKContextRef, WKStringRef messageName, WKTypeRef messageBody, const void* clientInfo)
+    {
+        if (!WKStringIsEqualToUTF8CString(messageName, "RoundTripReturn"))
+            return;
+
+        ((WebKit2UserMessageRoundTripTest*)clientInfo)->recievedBody = messageBody;
+        ((WebKit2UserMessageRoundTripTest*)clientInfo)->didReceiveMessage = true;
+    }
+
+    static void didFinishLoadForFrame(WKPageRef, WKFrameRef, WKTypeRef, const void* clientInfo)
+    {
+        ((WebKit2UserMessageRoundTripTest*)clientInfo)->didFinishLoad = true;
+    }
+
+    static void setInjectedBundleClient(WKContextRef context, const void* clientInfo)
+    {
+        WKContextInjectedBundleClientV1 injectedBundleClient;
+        memset(&injectedBundleClient, 0, sizeof(injectedBundleClient));
+
+        injectedBundleClient.base.version = 1;
+        injectedBundleClient.base.clientInfo = clientInfo;
+        injectedBundleClient.didReceiveMessageFromInjectedBundle = didReceiveMessageFromInjectedBundle;
+
+        WKContextSetInjectedBundleClient(context, &injectedBundleClient.base);
+    }
+
+    static void setPageLoaderClient(WKPageRef page, const void* clientInfo)
+    {
+        WKPageLoaderClientV3 loaderClient;
+        memset(&loaderClient, 0, sizeof(loaderClient));
+
+        loaderClient.base.version = 3;
+        loaderClient.base.clientInfo = clientInfo;
+        loaderClient.didFinishLoadForFrame = didFinishLoadForFrame;
+
+        WKPageSetPageLoaderClient(page, &loaderClient.base);
+    }
+
+    virtual void SetUp()
+    {
+        context = adoptWK(Util::createContextForInjectedBundleTest("UserMessageTest"));
+        setInjectedBundleClient(context.get(), this);
+
+        webView = std::make_unique<PlatformWebView>(context.get());
+        setPageLoaderClient(webView->page(), this);
+
+        didFinishLoad = false;
+        didReceiveMessage = false;
+
+        // Force the creation of the 
+        WKPageLoadURL(webView->page(), adoptWK(Util::createURLForResource("simple", "html")).get());
+        Util::run(&didFinishLoad);
+
+    }
+
+    // Used to test sending a WKType round trip to the WebProcess and back.
+    // Result is stored into the recievedBody member variable.
+    void roundTrip(WKTypeRef object)
+    {
+        WKTypeID storedTypeID = WKGetTypeID(object);
+    
+        recievedBody.clear();
+        didReceiveMessage = false;
+        WKContextPostMessageToInjectedBundle(context.get(), Util::toWK("RoundTrip").get(), object);
+        Util::run(&didReceiveMessage);
+
+        EXPECT_NOT_NULL(recievedBody);
+        EXPECT_EQ(storedTypeID, WKGetTypeID(recievedBody.get()));
+    }
+};
+
+
+TEST_F(WebKit2UserMessageRoundTripTest, WKURLRequestRef)
+{
+    WKRetainPtr<WKURLRef> url = adoptWK(WKURLCreateWithUTF8CString("http://webkit.org/"));
+    WKRetainPtr<WKURLRequestRef> request = adoptWK(WKURLRequestCreateWithWKURL(url.get()));
+    
+    roundTrip(request.get());
+    WKTypeRef roundTrippedTypeRef = recievedBody.get();
+
+    WKRetainPtr<WKURLRequestRef> roundTrippedRequest = static_cast<WKURLRequestRef>(roundTrippedTypeRef);
+    WKRetainPtr<WKURLRef> roundTrippedURL = adoptWK(WKURLRequestCopyURL(roundTrippedRequest.get()));
+    EXPECT_TRUE(WKURLIsEqual(roundTrippedURL.get(), url.get()));
+}
+
+TEST_F(WebKit2UserMessageRoundTripTest, WKURL)
+{
+    WKRetainPtr<WKURLRef> url = adoptWK(WKURLCreateWithUTF8CString("http://webkit.org/"));
+    
+    roundTrip(url.get());
+    WKTypeRef roundTrippedTypeRef = recievedBody.get();
+
+    WKRetainPtr<WKURLRef> roundTrippedURL = static_cast<WKURLRef>(roundTrippedTypeRef);
+    EXPECT_TRUE(WKURLIsEqual(roundTrippedURL.get(), url.get()));
+}
+
+TEST_F(WebKit2UserMessageRoundTripTest, WKString)
+{
+    WKRetainPtr<WKStringRef> string = adoptWK(WKStringCreateWithUTF8CString("An important string"));
+    
+    roundTrip(string.get());
+    WKTypeRef roundTrippedTypeRef = recievedBody.get();
+
+    WKRetainPtr<WKStringRef> roundTrippedString = static_cast<WKStringRef>(roundTrippedTypeRef);
+    EXPECT_TRUE(WKStringIsEqual(roundTrippedString.get(), string.get()));
+}
+
+} // namespace TestWebKitAPI
+
+#endif