[Chromedriver] Disable testColdExecuteScript Py test on HEAD

BUG=chromedriver:1450

Review-Url: https://codereview.chromium.org/2223143002
Cr-Commit-Position: refs/heads/master@{#410411}

chrome/test/chromedriver/test/run_py_tests.py

@@ -72,6 +72,8 @@ _VERSION_SPECIFIC_FILTER['HEAD'] = [
     'ChromeDriverTest.testConsoleLogSources',
     # https://bugs.chromium.org/p/chromedriver/issues/detail?id=1447
     'ChromeDriverTest.testPendingConsoleLog',
+    # https://bugs.chromium.org/p/chromedriver/issues/detail?id=1450
+    'PerfTest.testColdExecuteScript',
 ]
 
 _OS_SPECIFIC_FILTER = {}