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

components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_test_utils.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_test_utils.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_test_utils.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_test_utils.cc
index 8011688749fab97da201b55dddcd780135725528..245d75c16c7d1102075227bcc235d04f73a9ca85 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_test_utils.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_test_utils.cc
@@ -8,6 +8,7 @@
 
 #include "base/bind.h"
 #include "base/command_line.h"
+#include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_compression_stats.h"
@@ -62,9 +63,10 @@ void DataReductionProxySettingsTestBase::SetUp() {
   ListPrefUpdate received_update(test_context_->pref_service(),
                                  prefs::kDailyHttpReceivedContentLength);
   for (int64_t i = 0; i < kNumDaysInHistory; i++) {
-    original_update->Insert(0,
-                            new base::StringValue(base::Int64ToString(2 * i)));
-    received_update->Insert(0, new base::StringValue(base::Int64ToString(i)));
+    original_update->Insert(
+        0, base::MakeUnique<base::StringValue>(base::Int64ToString(2 * i)));
+    received_update->Insert(
+        0, base::MakeUnique<base::StringValue>(base::Int64ToString(i)));
   }
   last_update_time_ = base::Time::Now().LocalMidnight();
   pref_service->SetInt64(prefs::kDailyHttpContentLengthLastUpdateDate,