sheriff: Disable AdTaggingEventWithScriptInStackBrowserTest

TBR=engedy

No-Presubmit: True
No-Try: True
Bug: 998405
Change-Id: I48efc4b83b9f525f641d4f290930c206c58fca89
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1772787Reviewed-by: Darren Shen <shend@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#691063}

chrome/browser/subresource_filter/ad_tagging_browsertest.cc

@@ -523,8 +523,9 @@ class AdTaggingEventWithScriptInStackBrowserTest
     : public AdTaggingBrowserTest,
       public ::testing::WithParamInterface<bool /* from_ad_script */> {};
 
+// crbug.com/998405. The test is flaky on multiple platforms.
 IN_PROC_BROWSER_TEST_P(AdTaggingEventWithScriptInStackBrowserTest,
-                       WindowOpenWithScriptInStack) {
+                       DISABLED_WindowOpenWithScriptInStack) {
   bool from_ad_script = GetParam();
   SCOPED_TRACE(::testing::Message() << "from_ad_script = " << from_ad_script);