Make OAuth2TokenService and subclasses take delegate by unique_ptr

chrome/browser/chromeos/settings/device_oauth2_token_service_unittest.cc

Index: chrome/browser/chromeos/settings/device_oauth2_token_service_unittest.cc
diff --git a/chrome/browser/chromeos/settings/device_oauth2_token_service_unittest.cc b/chrome/browser/chromeos/settings/device_oauth2_token_service_unittest.cc
index 5b99cf62a0f7558a74dac600ae8ba80b39169e15..e2a6a7f2c76ac8eee7ff3a5e5bb37a3e65536d75 100644
--- a/chrome/browser/chromeos/settings/device_oauth2_token_service_unittest.cc
+++ b/chrome/browser/chromeos/settings/device_oauth2_token_service_unittest.cc
@@ -131,11 +131,10 @@ class DeviceOAuth2TokenServiceTest : public testing::Test {
   }
 
   void CreateService() {
-    DeviceOAuth2TokenServiceDelegate* delegate =
-        new DeviceOAuth2TokenServiceDelegate(request_context_getter_.get(),
-                                             scoped_testing_local_state_.Get());
+    auto delegate = base::MakeUnique<DeviceOAuth2TokenServiceDelegate>(
+        request_context_getter_.get(), scoped_testing_local_state_.Get());
     delegate->max_refresh_token_validation_retries_ = 0;
-    oauth2_service_.reset(new DeviceOAuth2TokenService(delegate));
+    oauth2_service_.reset(new DeviceOAuth2TokenService(std::move(delegate)));

[msarda, 2017/02/10 09:21:22]

Optional: Consider using MakeUnique.

[bsazonov, 2017/02/10 10:41:50]

The DeviceOAuth2TokenService ctor is private, so MakeUnique won't compile. There
are some workarounds for it, but they are outside of this CL's scope.

     oauth2_service_->set_max_authorization_token_fetch_retries_for_testing(0);
   }