[Chromedriver] Disable FrameSwitchingTest.testGetCurrentUrl
[Chromedriver] Disable FrameSwitchingTest.testGetCurrentUrl

BUG=chromedriver:1249

Review URL: https://codereview.chromium.org/1403423005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#355931}

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