Files.app: Provide detailed change information on onDirectoryChanged event

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/callback_helpers.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "base/task_runner_util.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/file_cache.h"
+#include "chrome/browser/chromeos/drive/file_change.h"
 #include "chrome/browser/chromeos/drive/file_errors.h"
 #include "chrome/browser/chromeos/drive/file_system/operation_observer.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/drive/job_scheduler.h"
 #include "chrome/browser/chromeos/drive/resource_entry_conversion.h"
 #include "chrome/browser/chromeos/drive/resource_metadata.h"
 #include "content/public/browser/browser_thread.h"
 #include "google_apis/drive/gdata_errorcode.h"
 
 using content::BrowserThread;
@@ skipping 496 matching lines @@
     scoped_ptr<ResourceEntry> entry_after_update,
     base::FilePath* cache_file_path,
     FileError error) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   if (error != FILE_ERROR_OK) {
     params->OnError(error);
     return;
   }
 
+  FileChange changed_files;
+  changed_files.Update(file_path,
+                       FileChange::FILE_TYPE_FILE,
+                       FileChange::ADD_OR_UPDATE);
   // Storing to cache changes the "offline available" status, hence notify.
-  observer_->OnDirectoryChangedByOperation(file_path.DirName());
+  observer_->OnDirectoryChangedByOperation(changed_files);
   params->OnDownloadCompleted(*cache_file_path, entry_after_update.Pass());
 }
 
 void DownloadOperation::CancelJob(JobID job_id) {
   scheduler_->CancelJob(job_id);
 }
 
 }  // namespace file_system
 }  // namespace drive