sync: Add helper class for P2P invalidations

chrome/browser/sync/test/integration/p2p_invalidation_forwarder.cc

Index: chrome/browser/sync/test/integration/p2p_invalidation_forwarder.cc
diff --git a/chrome/browser/sync/test/integration/p2p_invalidation_forwarder.cc b/chrome/browser/sync/test/integration/p2p_invalidation_forwarder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..fef2541bef41c7f5625de5ce96d3113846a18fe5
--- /dev/null
+++ b/chrome/browser/sync/test/integration/p2p_invalidation_forwarder.cc
@@ -0,0 +1,36 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/sync/test/integration/p2p_invalidation_forwarder.h"
+
+#include "chrome/browser/invalidation/p2p_invalidation_service.h"
+#include "chrome/browser/sync/profile_sync_service.h"
+#include "sync/internal_api/public/sessions/sync_session_snapshot.h"
+
+P2PInvalidationForwarder::P2PInvalidationForwarder(
+    ProfileSyncService* sync_service,
+    invalidation::P2PInvalidationService* invalidation_service)
+  : sync_service_(sync_service),
+    invalidation_service_(invalidation_service) {
+  sync_service_->AddObserver(this);
+}
+
+P2PInvalidationForwarder::~P2PInvalidationForwarder() {
+  sync_service_->RemoveObserver(this);
+}
+
+void P2PInvalidationForwarder::OnStateChanged() {}
+
+void P2PInvalidationForwarder::OnSyncCycleCompleted() {
+  const syncer::sessions::SyncSessionSnapshot& snap =
+      sync_service_->GetLastSessionSnapshot();
+  bool is_notifiable_commit =
+      (snap.model_neutral_state().num_successful_commits > 0);
+  if (is_notifiable_commit && invalidation_service_) {
+    syncer::ModelTypeSet model_types =
+        snap.model_neutral_state().commit_request_types;
+    syncer::ObjectIdSet ids = ModelTypeSetToObjectIdSet(model_types);
+    invalidation_service_->SendInvalidation(ids);
+  }
+}