[Sync] Convert notifications for UNKNOWN to notifications for everything

chrome/browser/sync/notifier/chrome_invalidation_client.cc

Index: chrome/browser/sync/notifier/chrome_invalidation_client.cc
diff --git a/chrome/browser/sync/notifier/chrome_invalidation_client.cc b/chrome/browser/sync/notifier/chrome_invalidation_client.cc
index 4a84d3d5210abd3622e4062f98f3083a7777d804..1fe2de005ffd734a165d6adcfc7fbce519a96c52 100644
--- a/chrome/browser/sync/notifier/chrome_invalidation_client.cc
+++ b/chrome/browser/sync/notifier/chrome_invalidation_client.cc
@@ -126,7 +126,14 @@ void ChromeInvalidationClient::Invalidate(
   VLOG(1) << "Invalidate: " << InvalidationToString(invalidation);
   syncable::ModelType model_type;
   if (ObjectIdToRealModelType(invalidation.object_id(), &model_type)) {
-    listener_->OnInvalidate(model_type);
+    // TODO(akalin): This is a hack to make new sync data types work
+    // with server-issued notifications.  Remove this when it's not
+    // needed anymore.
+    if (model_type == syncable::UNSPECIFIED) {
+      listener_->OnInvalidateAll();
+    } else {
+      listener_->OnInvalidate(model_type);
+    }
   } else {
     LOG(WARNING) << "Could not get invalidation model type; "
                  << "invalidating everything";