Add chrome.searchEnginesPrivate API and Search Settings page.

chrome/test/data/extensions/api_test/search_engines_private/test.js

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This just tests the interface. It does not test for specific results, only
+// that callbacks are correctly invoked, expected parameters are correct,
+// and failures are detected.
+
+function callbackResult(result) {
+  if (chrome.runtime.lastError)
+    chrome.test.fail(chrome.runtime.lastError.message);
+  else if (result == false)
+    chrome.test.fail('Failed: ' + result);
+}
+
+var availableTests = [
+  function setSelectedSearchEngine() {
+    chrome.searchEnginesPrivate.getDefaultSearchEngines(function(engines) {
+      chrome.searchEnginesPrivate.setSelectedSearchEngine(
+          engines[engines.length - 1].guid);
+      chrome.searchEnginesPrivate.getDefaultSearchEngines(function(newEngines) {
+        chrome.test.assertTrue(newEngines[newEngines.length - 1].isSelected);
+        chrome.test.succeed();
+      });
+    });
+  },
+
+  function onDefaultSearchEnginesChanged() {
+    chrome.searchEnginesPrivate.onDefaultSearchEnginesChanged.addListener(
+        function(engines) {
+          chrome.test.assertTrue(engines[1].isSelected,
+              'Engine 1 should be selected');
+          chrome.test.succeed();
+        });
+    chrome.searchEnginesPrivate.getDefaultSearchEngines(function(engines) {
+      chrome.searchEnginesPrivate.setSelectedSearchEngine(engines[1].guid);
+    });
+  }
+];
+
+var testToRun = window.location.search.substring(1);
+chrome.test.runTests(availableTests.filter(function(op) {
+  return op.name == testToRun;
+}));
+