[Chromedriver] Disable testGetNamedCookie on WebView shell.

Bug: 
Change-Id: I616d2f8c72bfd3c871aded779c63e6ed47da7e88
Reviewed-on: https://chromium-review.googlesource.com/575784Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Gauri Manikpure <gmanikpure@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487545}

chrome/test/chromedriver/test/run_py_tests.py

@@ -222,6 +222,7 @@ _ANDROID_NEGATIVE_FILTER['chromedriver_webview_shell'] = (
         'ChromeDriverLogTest.testDisablingDriverLogsSuppressesChromeDriverLog',
         'ChromeDriverTest.testCookiePath',
         'ChromeDriverTest.testGetHttpOnlyCookie',
+        'ChromeDriverTest.testGetNamedCookie',
     ]
 )