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ajwong authored
Places a small array in PendingTask that records the past 4 PostTasks that result in this task being run. In essence, it creates a backtrace of the asynchronous call stack resulting in this task being run. This array is copied onto the stack during execution so that it is available in crash dumps. BUG=690197 Review-Url: https://codereview.chromium.org/1044413002 Cr-Commit-Position: refs/heads/master@{#449471}
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