Add sync manager classes for backup/rollback:

sync/internal_api/public/test/test_internal_components_factory.h

Index: sync/internal_api/public/test/test_internal_components_factory.h
diff --git a/sync/internal_api/public/test/test_internal_components_factory.h b/sync/internal_api/public/test/test_internal_components_factory.h
index 3b7d3c5a87741c140bca9121fce6d32cd231bf90..4c13df360433dfae83363f58e5981521de71847c 100644
--- a/sync/internal_api/public/test/test_internal_components_factory.h
+++ b/sync/internal_api/public/test/test_internal_components_factory.h
@@ -23,6 +23,8 @@ class TestInternalComponentsFactory : public InternalComponentsFactory {
  public:
   explicit TestInternalComponentsFactory(const Switches& switches,
                                          StorageOption option);
+  explicit TestInternalComponentsFactory(

[Nicolas Zea, 2014/04/14 21:36:31]

Comment for both these constructors, and what they're for.

[haitaol1, 2014/04/15 00:19:06]

Done.

+      scoped_ptr<syncable::DirectoryBackingStore> store);
   virtual ~TestInternalComponentsFactory();
 
   virtual scoped_ptr<SyncScheduler> BuildScheduler(
@@ -50,6 +52,8 @@ class TestInternalComponentsFactory : public InternalComponentsFactory {
   const Switches switches_;
   const StorageOption storage_option_;
 
+  scoped_ptr<syncable::DirectoryBackingStore> store_;
+
   DISALLOW_COPY_AND_ASSIGN(TestInternalComponentsFactory);
 };