[SyncFS] Improve debug logs of MetadataDatabaseIndex

chrome/browser/sync_file_system/drive_backend/remote_to_local_syncer.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/remote_to_local_syncer.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/format_macros.h"
 #include "base/location.h"
@@ skipping 113 matching lines @@
   remote_metadata_ = GetFileMetadata(
       metadata_database(), dirty_tracker_->file_id());
 
   if (!remote_metadata_ || !remote_metadata_->has_details()) {
     if (remote_metadata_ && !remote_metadata_->has_details()) {
       LOG(ERROR) << "Missing details of a remote file: "
                  << remote_metadata_->file_id();
       NOTREACHED();
     }
     util::Log(logging::LOG_VERBOSE, FROM_HERE,
-              "[Remote -> Local]: Missing remote file case.");
+              "[Remote -> Local]: Missing remote metadata case.");
     HandleMissingRemoteMetadata(callback);
     return;
   }
 
   DCHECK(remote_metadata_);
   DCHECK(remote_metadata_->has_details());
   const FileDetails& remote_details = remote_metadata_->details();
 
   if (!dirty_tracker_->active() ||
       HasDisabledAppRoot(metadata_database(), *dirty_tracker_)) {
@@ skipping 617 matching lines @@
   return sync_context_->GetMetadataDatabase();
 }
 
 RemoteChangeProcessor* RemoteToLocalSyncer::remote_change_processor() {
   DCHECK(sync_context_->GetRemoteChangeProcessor());
   return sync_context_->GetRemoteChangeProcessor();
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system