Ensure tests have an active task runner

chrome/browser/background/background_contents_service_unittest.cc

 // Copyright (c) 2012 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 "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/background/background_contents.h"
 #include "chrome/browser/background/background_contents_service.h"
 #include "chrome/browser/background/background_contents_service_factory.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/common/extensions/extension_test_util.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/browser_with_test_window_test.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "chrome/test/base/testing_profile.h"
 #include "chrome/test/base/testing_profile_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/test/test_browser_thread.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "extensions/common/extension.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 #include "url/gurl.h"
 
 #if defined(ENABLE_NOTIFICATIONS)
 #include "chrome/browser/notifications/message_center_notification_manager.h"
 #include "chrome/browser/notifications/notification.h"
 #include "ui/message_center/fake_message_center_tray_delegate.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/message_center_observer.h"
 #endif
 
 class BackgroundContentsServiceTest : public testing::Test {
  public:
   BackgroundContentsServiceTest() {}
   ~BackgroundContentsServiceTest() override {}
   void SetUp() override {
     command_line_.reset(new base::CommandLine(base::CommandLine::NO_PROGRAM));
+    BackgroundContentsService::DisableCloseBalloonForTesting(true);
+  }
+
+  void TearDown() override {
+    BackgroundContentsService::DisableCloseBalloonForTesting(false);
   }
 
   const base::DictionaryValue* GetPrefs(Profile* profile) {
     return profile->GetPrefs()->GetDictionary(
         prefs::kRegisteredBackgroundContents);
   }
 
   // Returns the stored pref URL for the passed app id.
   std::string GetPrefURLForApp(Profile* profile, const base::string16& appid) {
     const base::DictionaryValue* pref = GetPrefs(profile);
     EXPECT_TRUE(pref->HasKey(base::UTF16ToUTF8(appid)));
     const base::DictionaryValue* value;
     pref->GetDictionaryWithoutPathExpansion(base::UTF16ToUTF8(appid), &value);
     std::string url;
     value->GetString("url", &url);
     return url;
   }
 
+  content::TestBrowserThreadBundle thread_bundle_;
   scoped_ptr<base::CommandLine> command_line_;
 };
 
 class MockBackgroundContents : public BackgroundContents {
  public:
   explicit MockBackgroundContents(Profile* profile)
       : appid_(base::ASCIIToUTF16("app_id")),
         profile_(profile) {
   }
   MockBackgroundContents(Profile* profile, const std::string& id)
@@ skipping 310 matching lines @@
   CreateCrashNotification(extension);
   CreateCrashNotification(extension);
 
   message_center::MessageCenter* message_center =
       message_center::MessageCenter::Get();
   message_center::NotificationList::Notifications notifications =
       message_center->GetVisibleNotifications();
   ASSERT_EQ(1u, notifications.size());
 }
 #endif