chromeos: Destruct DriveResourceMetadata on the blocking pool

chrome/browser/chromeos/drive/drive_system_service.cc

 // Copyright (c) 2012 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/chromeos/drive/drive_system_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 79 matching lines @@
 
   return base::StringPrintf("%s-%s %s (%s)",
                             kDriveClientName,
                             version.c_str(),
                             kLibraryInfo,
                             os_cpu_info.c_str());
 }
 
 }  // namespace
 
-void DriveSystemService::DriveCacheDeleter::operator()(
-    DriveCache* cache) const {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  if (cache)
-    cache->Destroy();
-}
-
 DriveSystemService::DriveSystemService(
     Profile* profile,
     google_apis::DriveServiceInterface* test_drive_service,
     const base::FilePath& test_cache_root,
     DriveFileSystemInterface* test_file_system)
     : profile_(profile),
       drive_disabled_(false),
       push_notification_registered_(false),
       ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
@@ skipping 299 matching lines @@
   if (factory_for_test_.is_null())
     service = new DriveSystemService(profile, NULL, base::FilePath(), NULL);
   else
     service = factory_for_test_.Run(profile);
 
   service->Initialize();
   return service;
 }
 
 }  // namespace drive