SyncFS: Support resolveLocalFileSystemURL on SyncFileSystem

chrome/browser/sync_file_system/local/local_file_sync_context.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync_file_system/local/local_file_sync_context.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/platform_file.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 441 matching lines @@
 
 void LocalFileSyncContext::InitializeFileSystemContextOnIOThread(
     const GURL& source_url,
     FileSystemContext* file_system_context) {
   DCHECK(io_task_runner_->RunsTasksOnCurrentThread());
   DCHECK(file_system_context);
   SyncFileSystemBackend* backend =
       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>;
     scoped_ptr<LocalFileChangeTracker>* tracker_ptr(
         new scoped_ptr<LocalFileChangeTracker>);
     base::PostTaskAndReplyWithResult(
         file_system_context->default_file_task_runner(),
         FROM_HERE,
         base::Bind(&LocalFileSyncContext::InitializeChangeTrackerOnFileThread,
                    this, tracker_ptr,
@@ skipping 288 matching lines @@
     return;
   }
 
   FileSystemURL url_for_sync = CreateSyncableFileSystemURLForSync(
       file_system_context, dest_url);
   file_system_context->operation_runner()->CopyInForeignFile(
       local_path, url_for_sync, callback);
 }
 
 }  // namespace sync_file_system