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lpy authored
Previously we reset runtime counters and dump them when we enter, exit top level trace events respectively. However, there is gap between two top level trace events and runtime counters may be activated, resetting the counters makes the accumulated time inaccurate, and we may end up with negative time due to the nature of how we accumulate time. This patch fixes this problem by only resetting counters when there's no counters active, and before dump counters, we traverse current active counters to calculate their time, and then restart their timer. BUG=chromium:658145 Review-Url: https://codereview.chromium.org/2457523002 Cr-Commit-Position: refs/heads/master@{#40653}
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