[Retry] SyncFS: Support resolveLocalFileSystemURL on SyncFileSystem

chrome/browser/sync_file_system/local/sync_file_system_backend.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/sync_file_system_backend.h"
 
 #include "base/logging.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/sync_file_system/local/local_file_change_tracker.h"
 #include "chrome/browser/sync_file_system/local/local_file_sync_context.h"
@@ skipping 48 matching lines @@
   DCHECK(CalledOnUIThread());
   return profile_;
 }
 
 SyncFileSystemBackend::SyncFileSystemBackend(Profile* profile)
     : context_(NULL),
       skip_initialize_syncfs_service_for_testing_(false) {
   DCHECK(CalledOnUIThread());
   if (profile)
     profile_holder_.reset(new ProfileHolder(profile));
+
+  // Register the service name here to enable to crack an URL on SyncFileSystem
+  // even if SyncFileSystemService has not started yet.
+  RegisterSyncableFileSystem();
 }
 
 SyncFileSystemBackend::~SyncFileSystemBackend() {
+  RevokeSyncableFileSystem();
+
   if (change_tracker_) {
     GetDelegate()->file_task_runner()->DeleteSoon(
         FROM_HERE, change_tracker_.release());
   }
 
   if (profile_holder_ && !CalledOnUIThread()) {
     BrowserThread::DeleteSoon(
         BrowserThread::UI, FROM_HERE, profile_holder_.release());
   }
 }
@@ skipping 199 matching lines @@
     callback.Run(GURL(), std::string(),
                  SyncStatusCodeToPlatformFileError(status));
     return;
   }
 
   GetDelegate()->OpenFileSystem(origin_url, type, mode, callback,
                                 GetSyncableFileSystemRootURI(origin_url));
 }
 
 }  // namespace sync_file_system