[Sync] Maintain a global_id mapping to update UserEvents that references navigations

components/sync/user_events/user_event_service_impl_unittest.cc

Index: components/sync/user_events/user_event_service_impl_unittest.cc
diff --git a/components/sync/user_events/user_event_service_impl_unittest.cc b/components/sync/user_events/user_event_service_impl_unittest.cc
index d6f4279f284ee4846c8b93b9a608db05954d5ff4..9f7676bb1c7448d104ea1705bb050f07322bbbe8 100644
--- a/components/sync/user_events/user_event_service_impl_unittest.cc
+++ b/components/sync/user_events/user_event_service_impl_unittest.cc
@@ -39,6 +39,11 @@ class TestSyncService : public FakeSyncService {
   ModelTypeSet preferred_data_types_;
 };
 
+class TestGlobalIdMapper : public GlobalIdMapper {
+  void AddGlobalIdChangeObserver(GlobalIdChange callback) override {}
+  int64_t GetLatestGlobalId(int64_t global_id) override { return global_id; }
+};
+
 class UserEventServiceImplTest : public testing::Test {
  protected:
   UserEventServiceImplTest() {
@@ -49,7 +54,8 @@ class UserEventServiceImplTest : public testing::Test {
   std::unique_ptr<UserEventSyncBridge> MakeBridge() {
     return base::MakeUnique<UserEventSyncBridge>(
         ModelTypeStoreTestUtil::FactoryForInMemoryStoreForTest(),
-        RecordingModelTypeChangeProcessor::FactoryForBridgeTest(&processor_));
+        RecordingModelTypeChangeProcessor::FactoryForBridgeTest(&processor_),
+        &mapper_);
   }
 
   const RecordingModelTypeChangeProcessor& processor() { return *processor_; }
@@ -62,6 +68,7 @@ class UserEventServiceImplTest : public testing::Test {
  private:
   std::unique_ptr<base::test::ScopedFeatureList> scoped_feature_list_;
   RecordingModelTypeChangeProcessor* processor_;
+  TestGlobalIdMapper mapper_;
   base::MessageLoop message_loop_;
 };