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Rename ValidatePage/MeasurePage -> ValidateAndMeasurePage for all files outside tools/telemetry and tools/perf.

BUG=383635

Review URL: https://codereview.chromium.org/452123002

Cr-Commit-Position: refs/heads/master@{#288459}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288459 0039d316-1c4b-4281-b951-d872f2087c98