Speculative stabilization of test_focusOnNavigation quick auto test

Reimplement setting focus on a HTML element in JavaScript.

Change-Id: I1db53bcb526fd52df1fa23527089f8186dfd0ea3
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

tests/auto/quick/qmltests/BLACKLIST

@@ -10,9 +10,6 @@ osx
 [WebViewGeopermission::test_geoPermissionRequest]
 osx
 
-[WebEngineViewFocusOnNavigation::test_focusOnNavigation]
-*
-
 [WebEngineViewLoadUrl::test_urlProperty]
 windows
 

tests/auto/quick/qmltests/data/tst_focusOnNavigation.qml

@@ -67,8 +67,6 @@ Item {
     TestCase {
         name: "WebEngineViewFocusOnNavigation"
         when: windowShown
-        function init() {
-        }
 
         function test_focusOnNavigation_data() {
             return [
@@ -79,18 +77,29 @@ Item {
             ]
         }
 
-        function triggerJavascriptFocus() {
-            var callbackCalled = false;
-            webView.runJavaScript("document.getElementById(\"input\").focus()", function(result) {
-                    callbackCalled = true;
-                });
-            wait(100);
-            verify(callbackCalled);
+        function getActiveElementId() {
+            var activeElementId;
+            webView.runJavaScript("document.activeElement.id", function(result) {
+                activeElementId = result;
+            });
+            tryVerify(function() { return activeElementId != undefined });
+            return activeElementId;
+        }
+
+        function verifyElementHasFocus(element) {
+            tryVerify(function() { return getActiveElementId() == element; }, 5000,
+                "Element \"" + element + "\" has focus");
+
+        }
+
+        function setFocusToElement(element) {
+            webView.runJavaScript("document.getElementById('" + element + "').focus()");
+            verifyElementHasFocus(element);
         }
 
         function loadAndTriggerFocusAndCompare(data) {
             verify(webView.waitForLoadSucceeded());
-            triggerJavascriptFocus();
+            setFocusToElement("input");
             compare(webView.activeFocus, data.viewReceivedFocus);
         }