[SyncFS] Drop test only un-thread-safe getters from SyncEngine (4)

chrome/browser/sync_file_system/drive_backend/sync_engine.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_engine.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_engine.cc b/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
index 93198c33155bad65944d62c32d149d33698f3449..ac4793efa0dded8bef19883928f4876e93cc1790 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
@@ -237,7 +237,7 @@ void SyncEngine::AppendDependsOnFactories(
 
 SyncEngine::~SyncEngine() {
   net::NetworkChangeNotifier::RemoveNetworkChangeObserver(this);
-  GetDriveService()->RemoveObserver(this);
+  drive_service_->RemoveObserver(this);
   if (notification_manager_)
     notification_manager_->RemoveObserver(this);
 
@@ -290,7 +290,7 @@ void SyncEngine::Initialize(const base::FilePath& base_dir,
 
   if (notification_manager_)
     notification_manager_->AddObserver(this);
-  GetDriveService()->AddObserver(this);
+  drive_service_->AddObserver(this);
   net::NetworkChangeNotifier::AddNetworkChangeObserver(this);
 }
 
@@ -509,14 +509,6 @@ void SyncEngine::OnNetworkChanged(
                  type));
 }
 
-drive::DriveServiceInterface* SyncEngine::GetDriveService() {
-  return drive_service_.get();
-}
-
-drive::DriveUploaderInterface* SyncEngine::GetDriveUploader() {
-  return drive_uploader_.get();
-}
-
 SyncEngine::SyncEngine(
     scoped_ptr<drive::DriveServiceInterface> drive_service,
     scoped_ptr<drive::DriveUploaderInterface> drive_uploader,