Revert of DataReductionProxyStatisticsPrefs should support WeakPtr

components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.cc
index e14c0aaf475cb5b7bd618782cecb9692720f2268..c712a158b5a8da1d01fa8e51df324cd7f9eea37f 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.cc
@@ -466,4 +466,32 @@
   }
 }
 
+void UpdateContentLengthPrefs(int received_content_length,
+                              int original_content_length,
+                              bool data_reduction_proxy_enabled,
+                              DataReductionProxyRequestType request_type,
+                              DataReductionProxyStatisticsPrefs* prefs) {
+  DCHECK(prefs);
+  int64 total_received = prefs->GetInt64(
+      data_reduction_proxy::prefs::kHttpReceivedContentLength);
+  int64 total_original = prefs->GetInt64(
+      data_reduction_proxy::prefs::kHttpOriginalContentLength);
+  total_received += received_content_length;
+  total_original += original_content_length;
+  prefs->SetInt64(
+      data_reduction_proxy::prefs::kHttpReceivedContentLength,
+      total_received);
+  prefs->SetInt64(
+      data_reduction_proxy::prefs::kHttpOriginalContentLength,
+      total_original);
+
+  UpdateContentLengthPrefsForDataReductionProxy(
+      received_content_length,
+      original_content_length,
+      data_reduction_proxy_enabled,
+      request_type,
+      base::Time::Now(),
+      prefs);
+}
+
 }  // namespace data_reduction_proxy