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Sadrul Habib Chowdhury authoredAdd some trace-events for the draw operation, and include breakdown steps for draw, swap, and wait-for-ack. Link these trace-events from the surface-aggregation trace-events for various surfaces, so that it is possible to track all the way from begin-frame to swap-ack (and later, presentation-time, when we request that for every frame). BUG=855328 Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel Change-Id: I319b551a46a0e3f9039ae5250a6b421079cb9b71 Reviewed-on: https://chromium-review.googlesource.com/1153494Reviewed-by: Fady Samuel <fsamuel@chromium.org> Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org> Cr-Commit-Position: refs/heads/master@{#579534} 0723e43e