Implement new invalidations ack tracking system

sync/sessions/nudge_tracker_unittest.cc

 // Copyright (c) 2012 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 "sync/internal_api/public/base/model_type_test_util.h"
+#include "sync/notifier/invalidation_util.h"
+#include "sync/notifier/object_id_invalidation_map.h"
 #include "sync/sessions/nudge_tracker.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
 
 namespace {
 
 testing::AssertionResult ModelTypeSetEquals(ModelTypeSet a, ModelTypeSet b) {
   if (a.Equals(b)) {
     return testing::AssertionSuccess();
@@ skipping 440 matching lines @@
   EXPECT_EQ(throttle2_length - throttle1_length,
             nudge_tracker_.GetTimeUntilNextUnthrottle(t1));
 
   // Expire the second interval.
   nudge_tracker_.UpdateTypeThrottlingState(t2);
   EXPECT_TRUE(nudge_tracker_.GetThrottledTypes().Empty());
 }
 
 }  // namespace sessions
 }  // namespace syncer