Don't treat picture ids as wrapping in the FrameBuffer2 class.

webrtc/modules/video_coding/rtp_frame_reference_finder_unittest.cc

 /*
  *  Copyright (c) 2016 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 36 matching lines @@
     packets_.erase(frame->first_seq_num());
   }
 
  private:
   std::map<uint16_t, VCMPacket> packets_;
 };
 
 class TestRtpFrameReferenceFinder : public ::testing::Test,
                                     public OnCompleteFrameCallback {
  protected:
-  static constexpr uint64_t kUnwrappedSequenceStart = 10000000000000000000UL;
+  static constexpr uint64_t kUnwrappedSequenceStart = 1000000000000000000UL;
 
   TestRtpFrameReferenceFinder()
       : rand_(0x8739211),
         ref_packet_buffer_(new FakePacketBuffer()),
         reference_finder_(new RtpFrameReferenceFinder(this)),
         frames_from_callback_(FrameComp()) {}
 
   uint16_t Rand() { return rand_.Rand<uint16_t>(); }
 
   void OnCompleteFrame(std::unique_ptr<FrameObject> frame) override {
@@ skipping 1240 matching lines @@
   CheckReferencesVp9(5, 1, 4);
   CheckReferencesVp9(6, 0, 4);
   CheckReferencesVp9(6, 1, 5);
   CheckReferencesVp9(7, 1, 6);
   CheckReferencesVp9(8, 0, 6);
   CheckReferencesVp9(8, 1, 7);
 }
 
 }  // namespace video_coding
 }  // namespace webrtc