Sync FileSystem: disable etag match on duplication recovery.

chrome/browser/sync_file_system/drive_file_sync_client.cc

Index: chrome/browser/sync_file_system/drive_file_sync_client.cc
diff --git a/chrome/browser/sync_file_system/drive_file_sync_client.cc b/chrome/browser/sync_file_system/drive_file_sync_client.cc
index 955c8dae82e588b48651076e50359c545cfe0d54..0f5bf6bfb069323dea3381fec7f89eb87aab5643 100644
--- a/chrome/browser/sync_file_system/drive_file_sync_client.cc
+++ b/chrome/browser/sync_file_system/drive_file_sync_client.cc
@@ -854,7 +854,7 @@ void DriveFileSyncClient::DeleteEntries(
 
   drive_service_->DeleteResource(
       entry->resource_id(),
-      entry->etag(),
+      std::string(),  // etag

[kinuko, 2013/02/12 07:57:30]

Can we elaborate this comment?  Like:

// We don't care conflicts here as other clients may be also deleting this file,
so passing an empty etag.
drive_service_->DeleteResource(
    entry->resource_id(),
    std::string(),  // empty etag
    ...

[tzik, 2013/02/12 11:48:18]

Done.

       base::Bind(&DriveFileSyncClient::DidDeleteEntry, AsWeakPtr(),
                  base::Passed(&entries), callback));
 }