When we set the MockMSE to run in the GPU Process we get failures: media/media-source/media-source-first-append-not-starting-at-zero.html ``` Enqueued so far: (expecting no frames yet) + 10{PTS({5/1 = 5.000000}), DTS({5/1 = 5.000000}), duration({1/1 = 1.000000}), flags(1), generation(0)} + 11{PTS({6/1 = 6.000000}), DTS({6/1 = 6.000000}), duration({1/1 = 1.000000}), flags(0), generation(0)} + 12{PTS({7/1 = 7.000000}), DTS({7/1 = 7.000000}), duration({1/1 = 1.000000}), flags(0), generation(0)} + 13{PTS({8/1 = 8.000000}), DTS({8/1 = 8.000000}), duration({1/1 = 1.000000}), flags(0), generation(0)} + 14{PTS({9/1 = 9.000000}), DTS({9/1 = 9.000000}), duration({1/1 = 1.000000}), flags(0), generation(0)} RUN(sourceBuffer.appendBuffer(syncSampleRun(0, 5))) EVENT(updateend) Enqueued now: ```
*** This bug has been marked as a duplicate of bug 254330 ***