Remove an unneeded hash_set from QuicAckNotifierManager.

net/quic/quic_ack_notifier_test.cc

 // Copyright 2013 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 "net/quic/quic_ack_notifier.h"
 
 #include "net/quic/test_tools/quic_test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 30 matching lines @@
 }
 
 // Should not trigger callback if we never provide all the seqnums.
 TEST_F(QuicAckNotifierTest, DoesNotTrigger) {
   // Should not trigger callback as not all packets have been seen.
   EXPECT_CALL(*delegate_, OnAckNotification(_, _, _)).Times(0);
   EXPECT_FALSE(notifier_->OnAck(26, zero_));
   EXPECT_FALSE(notifier_->OnAck(99, zero_));
 }
 
+// Should not trigger callback if we abandon all three packets.
+TEST_F(QuicAckNotifierTest, AbandonDoesNotTrigger) {
+  // Should not trigger callback as not all packets have been seen.
+  EXPECT_CALL(*delegate_, OnAckNotification(_, _, _)).Times(0);
+  EXPECT_FALSE(notifier_->OnPacketAbandoned());
+  EXPECT_FALSE(notifier_->OnPacketAbandoned());
+  EXPECT_TRUE(notifier_->OnPacketAbandoned());
+}
+
 // Should trigger even after updating sequence numbers and receiving ACKs for
 // new sequeunce numbers.
 TEST_F(QuicAckNotifierTest, UpdateSeqNums) {
   // Update a couple of the sequence numbers (i.e. retransmitted packets)
   notifier_->OnPacketRetransmitted(20);
   notifier_->OnPacketRetransmitted(3);
 
   EXPECT_CALL(*delegate_, OnAckNotification(2, 20 + 3, _)).Times(1);
   EXPECT_FALSE(notifier_->OnAck(26, zero_));    // original
   EXPECT_FALSE(notifier_->OnAck(3000, zero_));  // updated
   EXPECT_TRUE(notifier_->OnAck(3001, zero_));   // updated
 }
 
 // Make sure the delegate is called with the delta time from the last ACK.
 TEST_F(QuicAckNotifierTest, DeltaTime) {
   const QuicTime::Delta first_delta = QuicTime::Delta::FromSeconds(5);
   const QuicTime::Delta second_delta = QuicTime::Delta::FromSeconds(33);
   const QuicTime::Delta third_delta = QuicTime::Delta::FromSeconds(10);
 
   EXPECT_CALL(*delegate_, OnAckNotification(0, 0, third_delta)).Times(1);
   EXPECT_FALSE(notifier_->OnAck(26, first_delta));
   EXPECT_FALSE(notifier_->OnAck(99, second_delta));
   EXPECT_TRUE(notifier_->OnAck(1234, third_delta));
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net