drive: Support offline delete

chrome/browser/chromeos/drive/change_list_processor.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/change_list_processor.h"
 
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
@@ skipping 303 matching lines @@
     switch (get_existing_entry_result) {
       case FILE_ERROR_OK:
         error = resource_metadata_->RemoveEntry(local_id);
         break;
       case FILE_ERROR_NOT_FOUND:  // Already deleted.
         error = FILE_ERROR_OK;
         break;
       default:
         error = get_existing_entry_result;
     }
+  } else if (existing_entry.parent_local_id() == util::kDriveOtherDirLocalId &&
+             existing_entry.deleted()) {

[kinaba, 2013/11/12 06:21:29]

Is it correct that a file inside a deleted directory (= .deleted() but parent !=
<other>) is refreshed? If it is refreshed, the 'deleted' flag is cleared and
hence it will appear in the SearchMetadata results.

[hashimoto, 2013/11/25 10:13:58]

Recursively marking entries as deleted might be bug-prone.
Switched back to use drive/trash.

+    // This entry was deleted locally, do nothing.
+    error = FILE_ERROR_OK;
   } else {
+    // Add or refresh the entry.
     const std::string& parent_resource_id =
         parent_resource_id_map_[entry.resource_id()];
     DCHECK(!parent_resource_id.empty()) << entry.resource_id();
 
     std::string parent_local_id;
     error = resource_metadata_->GetIdByResourceId(
         parent_resource_id, &parent_local_id);
     if (error == FILE_ERROR_OK) {
       ResourceEntry new_entry(entry);
       new_entry.set_parent_local_id(parent_local_id);
@@ skipping 114 matching lines @@
         resource_metadata_->GetSubDirectoriesRecursively(local_id,
                                                          &sub_directories);
         changed_dirs_.insert(sub_directories.begin(), sub_directories.end());
       }
     }
   }
 }
 
 }  // namespace internal
 }  // namespace drive