[Chromedriver] Disable testShadowDomStaleReference on head
[Chromedriver] Disable testShadowDomStaleReference on head

BUG=chromedriver:1302

Review URL: https://codereview.chromium.org/1553453002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#367005}

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