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

components/data_reduction_proxy/core/browser/data_reduction_proxy_config_retrieval_params.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 "components/data_reduction_proxy/core/browser/data_reduction_proxy_config_retrieval_params.h"
 
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
+#include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_pref_names.h"
-#include "components/prefs/pref_service.h"
 #include "components/variations/variations_associated_data.h"
 
 namespace {
 
 // The trial group prefix for which an experiment is considered enabled.
 const char kEnabled[] = "Enabled";
 
 // The minimum interval (in seconds) at which the config retrieval can occur.
 const int kConfigFetchMinimumIntervalSeconds = 300;
 
@@ skipping 239 matching lines @@
         NOTREACHED();
     }
   }
 }
 
 void DataReductionProxyConfigRetrievalParams::RefreshConfig() {
   config_expiration_ = base::Time::Now() + config_expiration_interval_;
 }
 
 }  // namespace data_reduction_proxy