REGRESSION (276307@main?): [ macOS ] TestWebKitAPI.WebKit.PDFLinkRefe…

…rrer is flaky timeout

https://bugs.webkit.org/show_bug.cgi?id=271259
rdar://125027483

Reviewed by Abrar Rahman Protyasha.

* Tools/TestWebKitAPI/Tests/WebKitCocoa/PDFLinkReferrer.mm:
(TEST):
Make sure layout is up to date before tapping on the PDF, or the HUD might
be in the wrong place and eat the touch.

Canonical link: https://commits.webkit.org/276369@main

Tools/TestWebKitAPI/Tests/WebKitCocoa/PDFLinkReferrer.mm

@@ -105,6 +105,10 @@ HTTPServer server([] (Connection connection) {
         EXPECT_NULL([action.request valueForHTTPHeaderField:@"Referer"]);
         decisionHandler(WKNavigationActionPolicyAllow);
     };
+
+    // We need to make sure the WKWebView's layout is up to date
+    // or the clicks might get eaten by the PDF's HUD.
+    [webView layoutSubtreeIfNeeded];
 
     [webView sendClicksAtPoint:NSMakePoint(75, 75) numberOfClicks:1];
     [navigationDelegate waitForDidFinishNavigation];