DataReductionProxyStatisticsPrefs should support WeakPtr

components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
index 3608f97bd12acfecb88c28985f05aa4efe096733..8801c1ac3f349dfb07568f4c74e0efd055dcf6b5 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h
@@ -112,10 +112,14 @@ class DataReductionProxySettings
       net::NetLog* net_log,
       DataReductionProxyEventStore* event_store);
 
-  // Sets the |statistics_prefs_| to be used for data reduction proxy pref reads
-  // and writes.
+  // Takes ownership of |statistics_prefs_|. |statistics_prefs| maintains
+  // compression statistics during use of the proxy.
   void SetDataReductionProxyStatisticsPrefs(
-      DataReductionProxyStatisticsPrefs* statistics_prefs);
+      scoped_ptr<DataReductionProxyStatisticsPrefs> statistics_prefs);
+
+  DataReductionProxyStatisticsPrefs* statistics_prefs() const {
+    return statistics_prefs_.get();
+  }
 
   // Sets the |on_data_reduction_proxy_enabled_| callback and runs to register
   // the DataReductionProxyEnabled synthetic field trial.
@@ -311,7 +315,7 @@ class DataReductionProxySettings
   BooleanPrefMember data_reduction_proxy_alternative_enabled_;
 
   PrefService* prefs_;
-  DataReductionProxyStatisticsPrefs* statistics_prefs_;
+  scoped_ptr<DataReductionProxyStatisticsPrefs> statistics_prefs_;
 
   net::URLRequestContextGetter* url_request_context_getter_;