Only re-enable remote service if the task used the network.

chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.cc

Index: chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.cc b/chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.cc
index 4746acfbb7ad5464462f143743700101e8d76870..4d319f47a3634eef120523d8a503522c60e4b99b 100644
--- a/chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.cc
+++ b/chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.cc
@@ -225,6 +225,7 @@ void LocalToRemoteSyncer::DeleteRemoteFile(
   DCHECK(remote_file_tracker_);
   DCHECK(remote_file_tracker_->has_synced_details());
 
+  set_used_network(true);
   drive_service()->DeleteResource(
       remote_file_tracker_->file_id(),
       remote_file_tracker_->synced_details().etag(),
@@ -277,6 +278,7 @@ void LocalToRemoteSyncer::DidGetMD5ForUpload(
     return;
   }
 
+  set_used_network(true);
   drive_uploader()->UploadExistingFile(
       remote_file_tracker_->file_id(),
       local_path_,
@@ -308,6 +310,7 @@ void LocalToRemoteSyncer::DidUploadExistingFile(
 void LocalToRemoteSyncer::UpdateRemoteMetadata(
     const SyncStatusCallback& callback) {
   DCHECK(remote_file_tracker_);
+  set_used_network(true);
   drive_service()->GetResourceEntry(
       remote_file_tracker_->file_id(),
       base::Bind(&LocalToRemoteSyncer::DidGetRemoteMetadata,
@@ -362,6 +365,7 @@ void LocalToRemoteSyncer::DidDeleteForCreateFolder(
 void LocalToRemoteSyncer::UploadNewFile(const SyncStatusCallback& callback) {
   DCHECK(remote_parent_folder_tracker_);
 
+  set_used_network(true);
   base::FilePath title = fileapi::VirtualPath::BaseName(url_.path());
   drive_uploader()->UploadNewFile(
       remote_parent_folder_tracker_->file_id(),