Convert //sync from scoped_ptr to std::unique_ptr

sync/engine/get_updates_delegate.h

Index: sync/engine/get_updates_delegate.h
diff --git a/sync/engine/get_updates_delegate.h b/sync/engine/get_updates_delegate.h
index 9b8e09de7fca3d202a5a548ba233655972694af0..c909625df1c6e52b659ef8e1b98ddbd8bdda2780 100644
--- a/sync/engine/get_updates_delegate.h
+++ b/sync/engine/get_updates_delegate.h
@@ -35,7 +35,7 @@ class SYNC_EXPORT GetUpdatesDelegate {
       sessions::StatusController* status,
       UpdateHandlerMap* update_handler_map) const = 0;
 
-  virtual scoped_ptr<ProtocolEvent> GetNetworkRequestEvent(
+  virtual std::unique_ptr<ProtocolEvent> GetNetworkRequestEvent(
       base::Time timestamp,
       const sync_pb::ClientToServerMessage& request) const = 0;
 };
@@ -56,7 +56,7 @@ class SYNC_EXPORT NormalGetUpdatesDelegate : public GetUpdatesDelegate {
                     sessions::StatusController* status,
                     UpdateHandlerMap* update_handler_map) const override;
 
-  scoped_ptr<ProtocolEvent> GetNetworkRequestEvent(
+  std::unique_ptr<ProtocolEvent> GetNetworkRequestEvent(
       base::Time timestamp,
       const sync_pb::ClientToServerMessage& request) const override;
 
@@ -85,7 +85,7 @@ class SYNC_EXPORT ConfigureGetUpdatesDelegate : public GetUpdatesDelegate {
                     sessions::StatusController* status,
                     UpdateHandlerMap* update_handler_map) const override;
 
-  scoped_ptr<ProtocolEvent> GetNetworkRequestEvent(
+  std::unique_ptr<ProtocolEvent> GetNetworkRequestEvent(
       base::Time timestamp,
       const sync_pb::ClientToServerMessage& request) const override;
 
@@ -113,7 +113,7 @@ class SYNC_EXPORT PollGetUpdatesDelegate : public GetUpdatesDelegate {
                     sessions::StatusController* status,
                     UpdateHandlerMap* update_handler_map) const override;
 
-  scoped_ptr<ProtocolEvent> GetNetworkRequestEvent(
+  std::unique_ptr<ProtocolEvent> GetNetworkRequestEvent(
       base::Time timestamp,
       const sync_pb::ClientToServerMessage& request) const override;