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Sudden platform system delay jumps can hurt AEC and we have no stats that monitor these jumps. How often do they occur, and when they are reported are they accurate? This CL logs all jumps in both the reported and actual delay. The histogram has been tested with a chromium build where a fake jump of 200 ms was applied after 5 seconds and it was registered correctly in chrome://histograms BUG=488124 R=henrik.lundin@webrtc.org, peah@webrtc.org Review URL: https://codereview.webrtc.org/1213733004. Cr-Commit-Position: refs/heads/master@{#9513}