Remove root resource id aliasing from DriveResourceMetadata.

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 118 matching lines @@
   }
   cache_.reset(new DriveCache(!test_cache_root.empty() ? test_cache_root :
                               DriveCache::GetCacheRootPath(profile),
                               blocking_task_runner_,
                               NULL /* free_disk_space_getter */));
   webapps_registry_.reset(new DriveWebAppsRegistry);
 
   // We can call DriveCache::GetCacheDirectoryPath safely even before the cache
   // gets initialized.
   resource_metadata_.reset(new DriveResourceMetadata(
-      drive_service_->GetRootResourceId(),
       cache_->GetCacheDirectoryPath(DriveCache::CACHE_TYPE_META),
       blocking_task_runner_));
 
   file_system_.reset(test_file_system ? test_file_system :
                      new DriveFileSystem(profile_,
                                          cache(),
                                          drive_service_.get(),
                                          webapps_registry(),
                                          resource_metadata_.get(),
                                          blocking_task_runner_));
@@ skipping 307 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