Fix typos in trace_event macros
Fix typos in trace_event macros

The comments in trace_event.h did not match the signatures in
trace_log.h. This fixes that.

Review URL: https://codereview.chromium.org/1315383002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#345893}

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