Revert of DataReductionProxyStatisticsPrefs should support WeakPtr

components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics_unittest.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics_unittest.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics_unittest.cc
index 4584d6c605524220360b98bd7d570a75fe5314a5..64b0ed12d67ddc786613a378f069fa1496a7962f 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics_unittest.cc
@@ -90,6 +90,42 @@
   TestingPrefServiceSimple pref_service_;
   scoped_ptr<DataReductionProxyStatisticsPrefs> statistics_prefs_;
 };
+
+TEST_F(ChromeNetworkDataSavingMetricsTest, TotalLengths) {
+  const int64 kOriginalLength = 200;
+  const int64 kReceivedLength = 100;
+
+  UpdateContentLengthPrefs(
+      kReceivedLength, kOriginalLength,
+      pref_service_.GetBoolean(
+          data_reduction_proxy::prefs::kDataReductionProxyEnabled),
+      UNKNOWN_TYPE, statistics_prefs_.get());
+
+  EXPECT_EQ(kReceivedLength,
+            statistics_prefs_->GetInt64(
+                data_reduction_proxy::prefs::kHttpReceivedContentLength));
+  EXPECT_FALSE(pref_service_.GetBoolean(
+      data_reduction_proxy::prefs::kDataReductionProxyEnabled));
+  EXPECT_EQ(kOriginalLength,
+            statistics_prefs_->GetInt64(
+                data_reduction_proxy::prefs::kHttpOriginalContentLength));
+
+  // Record the same numbers again, and total lengths should be doubled.
+  UpdateContentLengthPrefs(
+      kReceivedLength, kOriginalLength,
+      pref_service_.GetBoolean(
+          data_reduction_proxy::prefs::kDataReductionProxyEnabled),
+      UNKNOWN_TYPE, statistics_prefs_.get());
+
+  EXPECT_EQ(kReceivedLength * 2,
+            statistics_prefs_->GetInt64(
+                data_reduction_proxy::prefs::kHttpReceivedContentLength));
+  EXPECT_FALSE(pref_service_.GetBoolean(
+      data_reduction_proxy::prefs::kDataReductionProxyEnabled));
+  EXPECT_EQ(kOriginalLength * 2,
+            statistics_prefs_->GetInt64(
+                data_reduction_proxy::prefs::kHttpOriginalContentLength));
+}
 
 // The initial last update time used in test. There is no leap second a few
 // days around this time used in the test.