Perform probing on network route change.

webrtc/modules/remote_bitrate_estimator/send_time_history_unittest.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 195 matching lines @@
 
   PacketFeedback packet2(0, 0, packets[1].sequence_number, 0, kPacingInfo1);
   EXPECT_TRUE(history_.GetFeedback(&packet2, true));
   EXPECT_EQ(packets[1], packet2);
 
   PacketFeedback packet3(0, 0, packets[2].sequence_number, 0, kPacingInfo2);
   EXPECT_TRUE(history_.GetFeedback(&packet3, true));
   EXPECT_EQ(packets[2], packet3);
 }
 
+TEST_F(SendTimeHistoryTest, Clear) {
+  const uint16_t kSeqNo = 1;
+  const int64_t kTimestamp = 2;
+  const PacedPacketInfo kPacingInfo(0, 5, 1200);
+
+  PacketFeedback packets[] = {{0, kTimestamp, kSeqNo, 0, kPacingInfo},
+                          {0, kTimestamp + 1, kSeqNo + 1, 0, kPacingInfo}};
+
+  AddPacketWithSendTime(packets[0].sequence_number, packets[0].payload_size,
+                        packets[0].send_time_ms, kPacingInfo);
+  AddPacketWithSendTime(packets[1].sequence_number, packets[1].payload_size,
+                        packets[1].send_time_ms, kPacingInfo);
+  PacketFeedback info(0, 0, packets[0].sequence_number, 0, kPacingInfo);
+  EXPECT_TRUE(history_.GetFeedback(&info, true));
+  EXPECT_EQ(packets[0], info);
+
+  history_.Clear();
+
+  PacketFeedback info2(0, 0, packets[1].sequence_number, 0, kPacingInfo);
+  EXPECT_FALSE(history_.GetFeedback(&info2, true));
+}
+
 }  // namespace test
 }  // namespace webrtc