Revert of DataReductionProxyStatisticsPrefs should support WeakPtr

chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.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 "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_service.h"
 #include "base/time/time.h"
 #include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.h"
@@ skipping 28 matching lines @@
   // Android and iOS in order for non-zero delays to be supported.
   // (http://crbug.com/408264)
   base::TimeDelta commit_delay = base::TimeDelta();
 #else
   base::TimeDelta commit_delay = base::TimeDelta::FromMinutes(60);
 #endif
 
   data_reduction_proxy::DataReductionProxyStatisticsPrefs*
       data_reduction_proxy_statistics_prefs =
           new data_reduction_proxy::DataReductionProxyStatisticsPrefs(
-              prefs, ui_task_runner, commit_delay);
+              prefs, ui_task_runner,
+              commit_delay);
 
   scoped_ptr<data_reduction_proxy::DataReductionProxyIOData>
       data_reduction_proxy_io_data(
           new data_reduction_proxy::DataReductionProxyIOData(
               DataReductionProxyChromeSettings::GetClient(),
               make_scoped_ptr(data_reduction_proxy_statistics_prefs),
               settings,
               net_log,
               io_task_runner,
               ui_task_runner));
   data_reduction_proxy_io_data->InitOnUIThread(prefs);
+  settings->SetDataReductionProxyStatisticsPrefs(
+      data_reduction_proxy_statistics_prefs);
 
   return data_reduction_proxy_io_data.Pass();
 }