sync: move internal_api components used by chrome/browser into internal_api/public

sync/notifier/chrome_invalidation_client.h

Index: sync/notifier/chrome_invalidation_client.h
diff --git a/sync/notifier/chrome_invalidation_client.h b/sync/notifier/chrome_invalidation_client.h
index acfc00178f17af2c23a0946836851528da756241..8234481d6a4a0f37a1aa6cc9ab9fcff3c0662f8c 100644
--- a/sync/notifier/chrome_invalidation_client.h
+++ b/sync/notifier/chrome_invalidation_client.h
@@ -19,10 +19,10 @@
 #include "google/cacheinvalidation/include/invalidation-listener.h"
 #include "sync/internal_api/public/syncable/model_type.h"
 #include "sync/internal_api/public/syncable/model_type_payload_map.h"
+#include "sync/internal_api/public/util/weak_handle.h"
 #include "sync/notifier/chrome_system_resources.h"
 #include "sync/notifier/invalidation_state_tracker.h"
 #include "sync/notifier/state_writer.h"
-#include "sync/util/weak_handle.h"
 
 namespace buzz {
 class XmppTaskParentInterface;