Implement periodic bandwidth probing in application-limited region.

webrtc/modules/pacing/mock/mock_paced_sender.h

 /*
  *  Copyright (c) 2013 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 15 matching lines @@
                                 uint32_t ssrc,
                                 uint16_t sequence_number,
                                 int64_t capture_time_ms,
                                 size_t bytes,
                                 bool retransmission));
   MOCK_METHOD2(CreateProbeCluster, void(int, int));
   MOCK_METHOD1(SetEstimatedBitrate, void(uint32_t));
   MOCK_CONST_METHOD0(QueueInMs, int64_t());
   MOCK_CONST_METHOD0(QueueInPackets, int());
   MOCK_CONST_METHOD0(ExpectedQueueTimeMs, int64_t());
+  MOCK_CONST_METHOD0(GetApplicationLimitedRegionStartTime,
+                     rtc::Optional<int64_t>());
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_PACING_MOCK_MOCK_PACED_SENDER_H_