Use extensions::ResultCatcher; delete ExtensionApiTest::ResultCatcher.

chrome/browser/chromeos/extensions/accessibility_features_apitest.cc

 // Copyright 2014 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.
 
 #include <string>
 #include <vector>
 
 #include "base/json/json_writer.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/common/pref_names.h"
+#include "extensions/test/result_catcher.h"
 
 // API tests for chrome.accessibilityFeatures API.
 // Note that the API is implemented using preference API infrastructure.
 // See preference_api.cc for the list of accessibility features exposed by the
 // API and the related preferences.
 
 namespace extensions {
 
 namespace {
 
@@ skipping 243 matching lines @@
       InitPrefServiceForTest(GetPrefs(), disabled_features, enabled_features));
 
   // Catch the second result notification sent by the test extension.
   ResultCatcher result_catcher;
   ASSERT_TRUE(result_catcher.GetNextResult()) << result_catcher.message();
 }
 
 }  // namespace
 
 }  // namespace extensions