Convert most geolocation layout tests to use a JS mock implementation.

third_party/WebKit/LayoutTests/fast/dom/Geolocation/script-tests/window-close-crash.js

 description("Tests the assertion that the GeolocationClient should not be updating<br>" +
             "when the GeolocationController is destroyed.<br>" +
             "See https://bugs.webkit.org/show_bug.cgi?id=52216");
 
-if (!window.testRunner || !window.internals)
-    debug('This test can not run without testRunner or internals');
+if (!window.testRunner || !window.mojo)
+    debug('This test can not run without testRunner or mojo');
 
 testRunner.waitUntilDone();
 testRunner.setCanOpenWindows();
 testRunner.setCloseRemainingWindowsWhenComplete(true);
 
 var otherWindow;
 
 function gotPosition(p)
 {
     testPassed("Received Geoposition.");
     otherWindow.close();
     window.setTimeout(waitForWindowToClose, 0);
 }
 
 function waitForWindowToClose()
 {
     if (!otherWindow.closed) {
         window.setTimeout(waitForWindowToClose, 0);
         return;
     }
     testPassed("Success - no crash!");
     finishJSTest();
 }
 
 debug("Main page opening resources/window-close-popup.html");
 otherWindow = window.open("resources/window-close-popup.html");
 
 window.jsTestIsAsync = true;