Split ExtensionTestObserver and move to //extensions.

extensions/browser/api/runtime/runtime_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 "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_function_test_utils.h"
 #include "chrome/browser/extensions/test_extension_dir.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/notification_service.h"
 #include "extensions/browser/api/runtime/runtime_api.h"
 #include "extensions/browser/extension_dialog_auto_confirm.h"
 #include "extensions/browser/extension_registry.h"
+#include "extensions/browser/notification_types.h"
 #include "extensions/test/result_catcher.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 
 // Tests the privileged components of chrome.runtime.
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ChromeRuntimePrivileged) {
   ASSERT_TRUE(RunExtensionTest("runtime/privileged")) << message_;
 }
 
 // Tests the unprivileged components of chrome.runtime.
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ChromeRuntimeUnprivileged) {
@@ skipping 98 matching lines @@
     } else {
       load_observer.Wait();
       WaitForExtensionViewsToLoad();
     }
   }
   ASSERT_TRUE(
       registry->GetExtensionById(extension_id, ExtensionRegistry::TERMINATED));
 }
 
 }  // namespace extensions