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diff --git a/Tools/TestWebKitAPI/Tests/WebKit2/ResponsivenessTimerDoesntFireEarly.cpp b/Tools/TestWebKitAPI/Tests/WebKit2/ResponsivenessTimerDoesntFireEarly.cpp
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+++ b/Tools/TestWebKitAPI/Tests/WebKit2/ResponsivenessTimerDoesntFireEarly.cpp
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+/*
+ * Copyright (C) 2011 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 "Test.h"
+
+#include "PlatformUtilities.h"
+#include "PlatformWebView.h"
+
+namespace TestWebKitAPI {
+
+static bool didFinishLoad;
+static bool didBecomeUnresponsive;
+static bool didBrieflyPause;
+
+static void didReceiveMessageFromInjectedBundle(WKContextRef, WKStringRef messageName, WKTypeRef, const void*)
+{
+    didBrieflyPause = true;
+    TEST_ASSERT(WKStringIsEqualToUTF8CString(messageName, "DidBrieflyPause"));
+}
+
+static void didFinishLoadForFrame(WKPageRef, WKFrameRef, WKTypeRef, const void*)
+{
+    didFinishLoad = true;
+}
+
+static void processDidBecomeUnresponsive(WKPageRef, const void*)
+{
+    didBecomeUnresponsive = true;
+}
+
+static void setInjectedBundleClient(WKContextRef context)
+{
+    WKContextInjectedBundleClient injectedBundleClient;
+    memset(&injectedBundleClient, 0, sizeof(injectedBundleClient));
+    injectedBundleClient.version = 0;
+    injectedBundleClient.clientInfo = 0;
+    injectedBundleClient.didReceiveMessageFromInjectedBundle = didReceiveMessageFromInjectedBundle;
+
+    WKContextSetInjectedBundleClient(context, &injectedBundleClient);
+}
+
+static void setPageLoaderClient(WKPageRef page)
+{
+    WKPageLoaderClient loaderClient;
+    memset(&loaderClient, 0, sizeof(loaderClient));
+    loaderClient.version = 0;
+    loaderClient.clientInfo = 0;
+    loaderClient.didFinishLoadForFrame = didFinishLoadForFrame;
+    loaderClient.processDidBecomeUnresponsive = processDidBecomeUnresponsive;
+
+    WKPageSetPageLoaderClient(page, &loaderClient);
+}
+
+TEST(WebKit2, ResponsivenessTimerDoesntFireEarly)
+{
+    WKRetainPtr<WKContextRef> context = Util::adoptWK(Util::createContextForInjectedBundleTest("ResponsivenessTimerDoesntFireEarlyTest"));
+    setInjectedBundleClient(context.get());
+
+    PlatformWebView webView(context.get());
+    setPageLoaderClient(webView.page());
+
+    WKPageLoadURL(webView.page(), Util::adoptWK(Util::createURLForResource("simple", "html")).get());
+    Util::run(&didFinishLoad);
+
+    WKContextPostMessageToInjectedBundle(context.get(), Util::toWK("BrieflyPause").get(), 0);
+
+    // Pressing a key on the keyboard should start the responsiveness timer. Since the web process
+    // is going to pause before it receives this keypress, it should take a little while to respond
+    // (but not so long that the responsiveness timer fires).
+    webView.simulateSpacebarKeyPress();
+
+    Util::run(&didBrieflyPause);
+    TEST_ASSERT(!didBecomeUnresponsive);
+}
+
+} // namespace TestWebKitAPI