Convert //sync from scoped_ptr to std::unique_ptr

sync/internal_api/public/internal_components_factory_impl.h

Index: sync/internal_api/public/internal_components_factory_impl.h
diff --git a/sync/internal_api/public/internal_components_factory_impl.h b/sync/internal_api/public/internal_components_factory_impl.h
index ea1057d5fb4f31ae9e203873920e401ae54d9379..06365c0ab930d3f4cb069a22cbfe736f49d124e3 100644
--- a/sync/internal_api/public/internal_components_factory_impl.h
+++ b/sync/internal_api/public/internal_components_factory_impl.h
@@ -23,12 +23,12 @@ class SYNC_EXPORT InternalComponentsFactoryImpl
   explicit InternalComponentsFactoryImpl(const Switches& switches);
   ~InternalComponentsFactoryImpl() override;
 
-  scoped_ptr<SyncScheduler> BuildScheduler(
+  std::unique_ptr<SyncScheduler> BuildScheduler(
       const std::string& name,
       sessions::SyncSessionContext* context,
       syncer::CancelationSignal* cancelation_signal) override;
 
-  scoped_ptr<sessions::SyncSessionContext> BuildContext(
+  std::unique_ptr<sessions::SyncSessionContext> BuildContext(
       ServerConnectionManager* connection_manager,
       syncable::Directory* directory,
       ExtensionsActivity* extensions_activity,
@@ -37,7 +37,7 @@ class SYNC_EXPORT InternalComponentsFactoryImpl
       ModelTypeRegistry* model_type_registry,
       const std::string& invalidator_client_id) override;
 
-  scoped_ptr<syncable::DirectoryBackingStore> BuildDirectoryBackingStore(
+  std::unique_ptr<syncable::DirectoryBackingStore> BuildDirectoryBackingStore(
       StorageOption storage,
       const std::string& dir_name,
       const base::FilePath& backing_filepath) override;