It was possible that "A < B" and "B < A" both evaluated to true. This manifested as an assert on Windows, and a memory leak on Linux. Note that the concept of "less than" is meaningless for this object. The operator is only needed so the object can be used as a key in an std::map. BUG=webrtc:6068 R=honghaiz@webrtc.org, kjellander@webrtc.org, skvlad@webrtc.org Review URL: https://codereview.webrtc.org/2187913002 . Cr-Commit-Position: refs/heads/master@{#13598}