Change more base::ListValue methods to use std::unique_ptr.

components/data_reduction_proxy/core/browser/data_reduction_proxy_compression_stats_unittest.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_compression_stats_unittest.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_compression_stats_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_compression_stats_unittest.cc
index 98c2615154b20468bce0120f07a760dcadc27445..31a62cc287de196682e27d5291cf28bbb43e2feb 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_compression_stats_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_compression_stats_unittest.cc
@@ -179,7 +179,8 @@ class DataReductionProxyCompressionStatsTest : public testing::Test {
     base::ListValue* update = compression_stats_->GetList(pref);
     update->Clear();
     for (size_t i = 0; i < kNumDaysInHistory; ++i) {
-      update->Insert(0, new base::StringValue(base::Int64ToString(0)));
+      update->Insert(
+          0, base::MakeUnique<base::StringValue>(base::Int64ToString(0)));
     }
   }
 
@@ -549,7 +550,8 @@ TEST_F(DataReductionProxyCompressionStatsTest,
       data_reduction_proxy::switches::kClearDataReductionProxyDataSavings);
 
   base::ListValue list_value;
-  list_value.Insert(0, new base::StringValue(base::Int64ToString(1234)));
+  list_value.Insert(
+      0, base::MakeUnique<base::StringValue>(base::Int64ToString(1234)));
   pref_service()->Set(prefs::kDailyHttpOriginalContentLength, list_value);
 
   ResetCompressionStatsWithDelay(
@@ -563,7 +565,8 @@ TEST_F(DataReductionProxyCompressionStatsTest,
 TEST_F(DataReductionProxyCompressionStatsTest,
        ClearPrefsOnRestartDisabled) {
   base::ListValue list_value;
-  list_value.Insert(0, new base::StringValue(base::Int64ToString(1234)));
+  list_value.Insert(
+      0, base::MakeUnique<base::StringValue>(base::Int64ToString(1234)));
   pref_service()->Set(prefs::kDailyHttpOriginalContentLength, list_value);
 
   ResetCompressionStatsWithDelay(