[sync] Componentize sync: Part 6: Add more SYNC_EXPORTs to files in src/sync/

sync/syncable/directory.h

Index: sync/syncable/directory.h
diff --git a/sync/syncable/directory.h b/sync/syncable/directory.h
index 0eb0ae792c38c3599ba51c6b6652d6b90e5ab58a..3b88112991e4f30227f423831c106956eff04b88 100644
--- a/sync/syncable/directory.h
+++ b/sync/syncable/directory.h
@@ -151,7 +151,7 @@ class SYNC_EXPORT Directory {
 
   // Various data that the Directory::Kernel we are backing (persisting data
   // for) needs saved across runs of the application.
-  struct PersistedKernelInfo {
+  struct SYNC_EXPORT_PRIVATE PersistedKernelInfo {
     PersistedKernelInfo();
     ~PersistedKernelInfo();
 
@@ -203,7 +203,7 @@ class SYNC_EXPORT Directory {
   // When the Directory is told to SaveChanges, a SaveChangesSnapshot is
   // constructed and forms a consistent snapshot of what needs to be sent to
   // the backing store.
-  struct SaveChangesSnapshot {
+  struct SYNC_EXPORT_PRIVATE SaveChangesSnapshot {
     SaveChangesSnapshot();
     ~SaveChangesSnapshot();