NetworkStateHandler::InitializeForTest() should return a std::unique_ptr.

chromeos/network/network_configuration_handler_unittest.cc

Index: chromeos/network/network_configuration_handler_unittest.cc
diff --git a/chromeos/network/network_configuration_handler_unittest.cc b/chromeos/network/network_configuration_handler_unittest.cc
index 6f14b7f40f2f63ec9e84cfd98c9257b436dc0795..2d17364c959a8e4bd46bb2e8652941141befb013 100644
--- a/chromeos/network/network_configuration_handler_unittest.cc
+++ b/chromeos/network/network_configuration_handler_unittest.cc
@@ -200,7 +200,7 @@ class NetworkConfigurationHandlerTest : public testing::Test {
     EXPECT_CALL(*mock_manager_client_, RemovePropertyChangedObserver(_))
         .Times(AnyNumber());
 
-    network_state_handler_.reset(NetworkStateHandler::InitializeForTest());
+    network_state_handler_ = NetworkStateHandler::InitializeForTest();
     network_configuration_handler_.reset(new NetworkConfigurationHandler());
     network_configuration_handler_->Init(network_state_handler_.get(),
                                          NULL /* network_device_handler */);
@@ -495,7 +495,7 @@ class NetworkConfigurationHandlerStubTest : public testing::Test {
   void SetUp() override {
     DBusThreadManager::Initialize();
 
-    network_state_handler_.reset(NetworkStateHandler::InitializeForTest());
+    network_state_handler_ = NetworkStateHandler::InitializeForTest();
     test_observer_.reset(new TestObserver());
     network_state_handler_->AddObserver(test_observer_.get(), FROM_HERE);