Use OAuth2 token for sync

sync/internal_api/public/sync_manager.h

Index: sync/internal_api/public/sync_manager.h
diff --git a/sync/internal_api/public/sync_manager.h b/sync/internal_api/public/sync_manager.h
index 3f961fba84805b68c8d5de974f858490a52c2235..361b02261834c26a94a2478adef6d70feb148ea6 100644
--- a/sync/internal_api/public/sync_manager.h
+++ b/sync/internal_api/public/sync_manager.h
@@ -65,8 +65,6 @@ struct SyncCredentials {
   std::string email;
   // The raw authentication token's bytes.
   std::string sync_token;
-  // (optional) The time at which the token was fetched/refreshed.
-  base::Time sync_token_time;
 };
 
 // SyncManager encapsulates syncable::Directory and serves as the parent of all
@@ -324,7 +322,8 @@ class SYNC_EXPORT SyncManager {
       scoped_ptr<InternalComponentsFactory> internal_components_factory,
       Encryptor* encryptor,
       UnrecoverableErrorHandler* unrecoverable_error_handler,
-      ReportUnrecoverableErrorFunction report_unrecoverable_error_function) = 0;
+      ReportUnrecoverableErrorFunction report_unrecoverable_error_function,
+      bool use_oauth2_token) = 0;
 
   // Throw an unrecoverable error from a transaction (mostly used for
   // testing).