Make OAuth2TokenService and subclasses take delegate by unique_ptr

components/signin/core/browser/fake_profile_oauth2_token_service.cc

Index: components/signin/core/browser/fake_profile_oauth2_token_service.cc
diff --git a/components/signin/core/browser/fake_profile_oauth2_token_service.cc b/components/signin/core/browser/fake_profile_oauth2_token_service.cc
index 876e8063f5c1246978a61fdbafec4a413a5b53d2..c15a1c3510a6d4f29b40dffcebb17c8b8be00ec1 100644
--- a/components/signin/core/browser/fake_profile_oauth2_token_service.cc
+++ b/components/signin/core/browser/fake_profile_oauth2_token_service.cc
@@ -6,6 +6,7 @@
 
 #include "base/bind.h"
 #include "base/location.h"
+#include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "google_apis/gaia/fake_oauth2_token_service_delegate.h"
@@ -19,11 +20,11 @@ FakeProfileOAuth2TokenService::PendingRequest::~PendingRequest() {}
 
 FakeProfileOAuth2TokenService::FakeProfileOAuth2TokenService()
     : FakeProfileOAuth2TokenService(
-          new FakeOAuth2TokenServiceDelegate(nullptr)) {}
+          base::MakeUnique<FakeOAuth2TokenServiceDelegate>(nullptr)) {}
 
 FakeProfileOAuth2TokenService::FakeProfileOAuth2TokenService(
-    OAuth2TokenServiceDelegate* delegate)
-    : ProfileOAuth2TokenService(delegate),
+    std::unique_ptr<OAuth2TokenServiceDelegate> delegate)
+    : ProfileOAuth2TokenService(std::move(delegate)),
       auto_post_fetch_response_on_message_loop_(false),
       weak_ptr_factory_(this) {}