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

components/content_settings/core/browser/content_settings_registry_unittest.cc

 // Copyright 2015 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/logging.h"
+#include "base/prefs/pref_registry.h"
 #include "base/values.h"
 #include "components/content_settings/core/browser/content_settings_info.h"
 #include "components/content_settings/core/browser/content_settings_registry.h"
 #include "components/content_settings/core/browser/website_settings_info.h"
 #include "components/content_settings/core/browser/website_settings_registry.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "components/pref_registry/pref_registry_syncable.h"
-#include "components/prefs/pref_registry.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content_settings {
 
 class ContentSettingsRegistryTest : public testing::Test {
  protected:
   ContentSettingsRegistryTest() : registry_(&website_settings_registry_) {}
   ContentSettingsRegistry* registry() { return &registry_; }
   WebsiteSettingsRegistry* website_settings_registry() {
     return &website_settings_registry_;
@@ skipping 56 matching lines @@
       EXPECT_FALSE(cookies_found);
       cookies_found = true;
     }
   }
 
   EXPECT_TRUE(plugins_found);
   EXPECT_TRUE(cookies_found);
 }
 
 }  // namespace content_settings