[flakiness] Disable ChromeDriverSiteIsolation.testCanClickOOPIF on Win.

ChromeDriverSiteIsolation.testCanClickOOPIF is flaky on win7-rel,
so it is also disabled on that bot.

TBR=jbudorick@chromium.org

Bug: 1025981
Change-Id: I8033dfe2aaee20f1b78ca428c3ed49f9c30d6c7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1925701
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Commit-Queue: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#716851}

chrome/test/chromedriver/test/run_py_tests.py

@@ -89,6 +89,8 @@
     'ChromeLogPathCapabilityTest.testChromeLogPath',
     # https://bugs.chromium.org/p/chromium/issues/detail?id=946704
     'ChromeDownloadDirTest.testFileDownloadWithClick',
+    # https://bugs.chromium.org/p/chromium/issues/detail?id=1025981
+    'ChromeDriverSiteIsolation.testCanClickOOPIF',
     'ChromeDriverTest.testBackNavigationAfterClickElement',
     'ChromeDriverTest.testCanClickInIframes',
     'ChromeDriverTest.testClickElementAfterNavigation',