[ChromeDriver] Disable testFileDownloadWithGet for Head versions
[ChromeDriver] Disable testFileDownloadWithGet for Head versions

BUG=chromedriver:1278

Review URL: https://codereview.chromium.org/1501853002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#363411}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk