drive: Stop returning FilePath from GetResourceEntryById

chrome/browser/chromeos/drive/file_system/download_operation.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/chromeos/drive/file_system/download_operation.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/task_runner_util.h"
@@ skipping 65 matching lines @@
 }
 
 // Calls CheckPreConditionForEnsureFileDownloaded() with the entry specified by
 // the given ID.
 FileError CheckPreConditionForEnsureFileDownloadedByResourceId(
     internal::ResourceMetadata* metadata,
     internal::FileCache* cache,
     const std::string& resource_id,
     base::FilePath* cache_file_path,
     ResourceEntry* entry) {
-  FileError error = metadata->GetResourceEntryById(resource_id, NULL, entry);
+  FileError error = metadata->GetResourceEntryById(resource_id, entry);
   if (error != FILE_ERROR_OK)
     return error;
   return CheckPreConditionForEnsureFileDownloaded(
       metadata, cache, *entry, cache_file_path);
 }
 
 // Calls CheckPreConditionForEnsureFileDownloaded() with the entry specified by
 // the given file path.
 FileError CheckPreConditionForEnsureFileDownloadedByPath(
     internal::ResourceMetadata* metadata,
@@ skipping 420 matching lines @@
   observer_->OnDirectoryChangedByOperation(file_path.DirName());
   callback.OnComplete(*cache_file_path, entry.Pass());
 }
 
 void DownloadOperation::CancelJob(JobID job_id) {
   scheduler_->CancelJob(job_id);
 }
 
 }  // namespace file_system
 }  // namespace drive