Revert of Delete base/prefs and update callers to use components.

extensions/browser/lazy_background_task_queue_unittest.cc

 // Copyright 2013 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 "extensions/browser/lazy_background_task_queue.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/prefs/testing_pref_service.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/pref_registry/testing_pref_service_syncable.h"
-#include "components/prefs/testing_pref_service.h"
 #include "components/user_prefs/user_prefs.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/test/test_browser_context.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_registry_factory.h"
 #include "extensions/browser/extensions_test.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/browser/process_manager_factory.h"
 #include "extensions/browser/test_extensions_browser_client.h"
 #include "extensions/common/extension.h"
@@ skipping 187 matching lines @@
   EXPECT_EQ(1u, queue.extensions_with_pending_tasks());
 
   // Processing tasks when there is one pending runs the task and removes the
   // extension from the list of extensions with pending tasks.
   queue.ProcessPendingTasks(NULL, browser_context(), extension.get());
   EXPECT_EQ(1, task_run_count());
   EXPECT_EQ(0u, queue.extensions_with_pending_tasks());
 }
 
 }  // namespace extensions