Detecting and fixing stringprintf.h format bugs

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 7280f5e7986df296365e71f4af98b37b72078e55..0e15dbac4ca52f63ca1ca589292ec016f2923792 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
@@ -148,9 +148,16 @@ void LocalToRemoteSyncer::RunPreflight(scoped_ptr<SyncTaskToken> token) {
   } else if (active_ancestor_path != path) {
     if (!active_ancestor_path.AppendRelativePath(path, &missing_entries)) {
       NOTREACHED();
-      token->RecordLog(base::StringPrintf(
-          "Detected invalid ancestor: %s",
-          active_ancestor_path.value().c_str()));
+#ifdef OS_WIN
+      // FilePath::StringType is std::wstring on Windows
+      token->RecordLog(
+          base::StringPrintf("Detected invalid ancestor: %ls",
+                             active_ancestor_path.value().c_str()));
+#else
+      token->RecordLog(
+          base::StringPrintf("Detected invalid ancestor: %s",
+                             active_ancestor_path.value().c_str()));
+#endif
       SyncTaskManager::NotifyTaskDone(token.Pass(), SYNC_STATUS_FAILED);
       return;
     }