GitLab

Also modify MeasurePage -> ValidateAndMeasurePage.

BUG=383635

Review URL: https://codereview.chromium.org/449963002

Cr-Commit-Position: refs/heads/master@{#288510}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288510 0039d316-1c4b-4281-b951-d872f2087c98