drive: Make FileResource copyable

chrome/browser/sync_file_system/drive_backend/sync_engine_initializer_unittest.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/drive_backend/sync_engine_initializer.h"
 
 #include "base/bind.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/run_loop.h"
 #include "chrome/browser/drive/drive_api_util.h"
@@ skipping 117 matching lines @@
     return drive::util::ConvertResourceEntryToFileResource(*entry);
   }
 
   scoped_ptr<google_apis::FileResource> CreateRemoteSyncRoot() {
     scoped_ptr<google_apis::FileResource> sync_root(
         CreateRemoteFolder(std::string(), kSyncRootFolderTitle));
 
     for (size_t i = 0; i < sync_root->parents().size(); ++i) {
       google_apis::GDataErrorCode error = google_apis::GDATA_OTHER_ERROR;
       fake_drive_service_.RemoveResourceFromDirectory(
-          sync_root->parents()[i]->file_id(),
+          sync_root->parents()[i].file_id(),
           sync_root->file_id(),
           CreateResultReceiver(&error));
       base::RunLoop().RunUntilIdle();
       EXPECT_EQ(google_apis::HTTP_NO_CONTENT, error);
     }
 
     return sync_root.Pass();
   }
 
   std::string GetSyncRootFolderID() {
@@ skipping 177 matching lines @@
 
   EXPECT_EQ(0u, CountTrackersForFile(sync_root->file_id()));
   EXPECT_FALSE(HasNoParent(sync_root->file_id()));
 
   EXPECT_EQ(1u, CountFileMetadata());
   EXPECT_EQ(1u, CountFileTracker());
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system