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

components/bookmarks/browser/bookmark_expanded_state_tracker_unittest.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 "components/bookmarks/browser/bookmark_expanded_state_tracker.h"
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
+#include "base/prefs/pref_registry_simple.h"
+#include "base/prefs/testing_pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/bookmarks/common/bookmark_pref_names.h"
 #include "components/bookmarks/test/bookmark_test_helpers.h"
 #include "components/bookmarks/test/test_bookmark_client.h"
-#include "components/prefs/pref_registry_simple.h"
-#include "components/prefs/testing_pref_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace bookmarks {
 
 class BookmarkExpandedStateTrackerTest : public testing::Test {
  public:
   BookmarkExpandedStateTrackerTest();
   ~BookmarkExpandedStateTrackerTest() override;
 
  protected:
@@ skipping 65 matching lines @@
   tracker->SetExpandedNodes(nodes);
   // Verify that the node is present.
   EXPECT_EQ(nodes, tracker->GetExpandedNodes());
   // Call remove all.
   model_->RemoveAllUserBookmarks();
   // Verify node is not present.
   EXPECT_TRUE(tracker->GetExpandedNodes().empty());
 }
 
 }  // namespace bookmarks