[SyncFS] Don't prune trashed file's dirtiness in MetadataDatabase

chrome/browser/sync_file_system/drive_backend/metadata_database.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/metadata_database.h"
 
 #include <algorithm>
 #include <stack>
 
 #include "base/bind.h"
@@ skipping 1922 matching lines @@
   FileMetadata metadata;
   if (!index_->GetFileMetadata(tracker.file_id(), &metadata) ||
       !tracker.active() || !tracker.dirty() ||
       !tracker.has_synced_details() ||
       tracker.needs_folder_listing())
     return false;
 
   const FileDetails& remote_details = metadata.details();
   const FileDetails& synced_details = tracker.synced_details();
   if (remote_details.title() != synced_details.title() ||
-      remote_details.md5() != synced_details.md5())
+      remote_details.md5() != synced_details.md5() ||
+      remote_details.missing() != synced_details.missing())
     return false;
 
   std::set<std::string> parents;
   for (int i = 0; i < remote_details.parent_folder_ids_size(); ++i)
     parents.insert(remote_details.parent_folder_ids(i));
 
   for (int i = 0; i < synced_details.parent_folder_ids_size(); ++i)
     if (parents.erase(synced_details.parent_folder_ids(i)) != 1)
       return false;
 
   if (!parents.empty())
     return false;
 
   return true;
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system