[SyncFS] Handle trashed flag in change list as missing file

BUG=401890

Review URL: https://codereview.chromium.org/449383002

Cr-Commit-Position: refs/heads/master@{#288326}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288326 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/sync_file_system/drive_backend/metadata_database.cc

@@ -105,7 +105,7 @@ void PopulateFileDetailsByFileResource(
   details->set_creation_time(file_resource.created_date().ToInternalValue());
   details->set_modification_time(
       file_resource.modified_date().ToInternalValue());
-  details->set_missing(false);
+  details->set_missing(file_resource.labels().is_trashed());
 }
 
 scoped_ptr<FileMetadata> CreateFileMetadataFromFileResource(