Add GROUP_FILE ModelSafeGroup

chrome/browser/sync/engine/mock_model_safe_workers.h

Index: chrome/browser/sync/engine/mock_model_safe_workers.h
diff --git a/chrome/browser/sync/engine/mock_model_safe_workers.h b/chrome/browser/sync/engine/mock_model_safe_workers.h
index e5526cf012c2231000496022449decd1d57e6b66..efe2a1e94ddaf4c7909133ccb38cd648bd08c70e 100644
--- a/chrome/browser/sync/engine/mock_model_safe_workers.h
+++ b/chrome/browser/sync/engine/mock_model_safe_workers.h
@@ -24,6 +24,11 @@ class MockDBModelWorker : public ModelSafeWorker {
   virtual ModelSafeGroup GetModelSafeGroup();
 };
 
+class MockFileModelWorker : public ModelSafeWorker {
+ public:
+  virtual ModelSafeGroup GetModelSafeGroup();
+};
+
 class MockModelSafeWorkerRegistrar : public ModelSafeWorkerRegistrar {
  public:
   virtual ~MockModelSafeWorkerRegistrar();