Implement new invalidations ack tracking system

sync/notifier/invalidation_util.h

Index: sync/notifier/invalidation_util.h
diff --git a/sync/notifier/invalidation_util.h b/sync/notifier/invalidation_util.h
index 699550e7a69cc416f047b1f46d22e9ab899edc34..66a9b216f954a9dead61898773367f42db9db29c 100644
--- a/sync/notifier/invalidation_util.h
+++ b/sync/notifier/invalidation_util.h
@@ -12,6 +12,7 @@
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
+#include "google/cacheinvalidation/include/types.h"

[akalin, 2013/11/21 04:31:36]

is this necessary? don't we want to keep the invalidation protobuf headers from
being pulled in by clients?

[rlarocque, 2013/11/21 20:09:27]

This one can be removed.  It's fixed in the latest upload.

There are other places where it must be included, though.  Most often it's
included so we can get the definition of invalidation::ObjectId.

Maybe some day we can land a change to the upstream cacheinvalidation code that
pulls that definition into a separate header file.  That would let us eliminate
most of these includes.

 #include "sync/base/sync_export.h"
 #include "sync/internal_api/public/base/model_type.h"