GitLab

This can be merged to ValidateAndMeasurePage method.

BUG=455391, 470147
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:linux_perf_bisect;tryserver.chromium.perf:mac_perf_bisect;tryserver.chromium.perf:android_nexus5_perf_bisect

Review URL: https://codereview.chromium.org/1124033004

Cr-Commit-Position: refs/heads/master@{#329468}