Removal of chrome.experimental.popup set of APIs

chrome/test/data/extensions/api_test/popup/popup_from_infobar/background.html

-<script>
-var pass = chrome.test.callbackPass;
-
-chrome.test.runTests([
-    function testShowsAndCanGetParent() {
-      chrome.tabs.getSelected(null, function(tab) {
-          chrome.experimental.infobars.show(
-              {tabId: tab.id, path:'in-infobar.html'});
-        });
-      // Flow continues in infobarCallback
-    }
-]);
-
-function infobarCallback(showPopupFunc) {
-  showPopupFunc();
-  // Flow continues in popupCallback
-}
-
-function popupCallback(popupWindow, getFromParentFunc) {
-  getFromParentFunc();
-  var result = popupWindow.document.getElementById('target').innerText;
-  if (!result) {
-    chrome.test.fail('no result');
-  }
-  chrome.test.assertEq(result, '42');
-  chrome.test.notifyPass();
-}
-
-</script>