SyncFS: Support resolveLocalFileSystemURL on SyncFileSystem

chrome/browser/sync_file_system/local/local_file_sync_context.cc

Index: chrome/browser/sync_file_system/local/local_file_sync_context.cc
diff --git a/chrome/browser/sync_file_system/local/local_file_sync_context.cc b/chrome/browser/sync_file_system/local/local_file_sync_context.cc
index 227ce74a0bde8414ea6a9c274b659aaaa4e5741f..c8b937a01a57f0ec9610df03dea90f165e626c51 100644
--- a/chrome/browser/sync_file_system/local/local_file_sync_context.cc
+++ b/chrome/browser/sync_file_system/local/local_file_sync_context.cc
@@ -495,8 +495,6 @@ void LocalFileSyncContext::InitializeFileSystemContextOnIOThread(
       SyncFileSystemBackend::GetBackend(file_system_context);
   DCHECK(backend);
   if (!backend->change_tracker()) {
-    // First registers the service name.
-    RegisterSyncableFileSystem();
     // Create and initialize LocalFileChangeTracker and call back this method
     // later again.
     std::set<GURL>* origins_with_changes = new std::set<GURL>;