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sleffler@chromium.org authored
Add TimeTicks::NowFromSystemTraceTime to return the current system trace event clock (falling back to TimeTicks::HighResNow when not supported). On systems where the system trace clock is available this allows system and chrome events to be stamped with a common clock (eliminating post-processing time shift adjustment that can be hard). BUG=chromium-os:27809 TEST=unit tests + collect trace data on chrome os w/ kernel that supports clock_gettime(CLOCK_SYSTEM_TRACE) Change-Id: Ia6a500bd13a6f09c49052a1dd1421027960d8dea Review URL: http://codereview.chromium.org/10257020 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@134772 0039d316-1c4b-4281-b951-d872f2087c98
190f13f7
