drive: Support offline delete

chrome/browser/chromeos/drive/sync/remove_performer.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/sync/remove_performer.h"
 
 #include "base/sequenced_task_runner.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/drive/job_scheduler.h"
@@ skipping 108 matching lines @@
 }
 
 void RemovePerformer::DeleteResourceAfterUpdateRemoteState(
     const FileOperationCallback& callback,
     const std::string& local_id,
     google_apis::GDataErrorCode status) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
 
   FileError error = GDataToFileError(status);
-  if (error != FILE_ERROR_OK && error != FILE_ERROR_NOT_FOUND) {
-    callback.Run(error);
+  if (error == FILE_ERROR_NOT_FOUND) {  // Remove local entry when not found.
+    RemoveEntryOnUIThread(blocking_task_runner_.get(), metadata_, local_id,
+                          callback);
     return;
   }
 
-  RemoveEntryOnUIThread(blocking_task_runner_.get(), metadata_, local_id,
-                        callback);
+  // Now we're done. If the entry is deleted on the server, it'll be also
+  // deleted locally on the next update.
+  callback.Run(error);
 }
 
 void RemovePerformer::UnparentResource(
     const FileOperationCallback& callback,
     const std::string& resource_id,
     const std::string& local_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());
 
   scheduler_->GetResourceEntry(
@@ skipping 53 matching lines @@
 
   base::PostTaskAndReplyWithResult(
       blocking_task_runner_.get(),
       FROM_HERE,
       base::Bind(&UpdateLocalStateAfterUnparent, metadata_, local_id),
       callback);
 }
 
 }  // namespace internal
 }  // namespace drive