Disable the flaky ScrolledNestedPopupMenuTest tests.

R=kenrb@chromium.org

Change-Id: I24fcca54fe990bbacc19d892d868b3501739a8f5
Bug: 889002
Reviewed-on: https://chromium-review.googlesource.com/c/1318430Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Commit-Queue: Ken Buchanan <kenrb@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605463}

content/browser/site_per_process_hit_test_browsertest.cc

@@ -4688,9 +4688,10 @@ IN_PROC_BROWSER_TEST_P(SitePerProcessHitTestBrowserTest,
 // On Mac and Android, the reported menu coordinates are relative to the
 // OOPIF, and its screen position is computed later, so this test isn't
 // relevant on those platforms.
+// TODO(crbug.com/889002): This test is flaky.
 #if !defined(OS_ANDROID) && !defined(OS_MACOSX)
 IN_PROC_BROWSER_TEST_P(SitePerProcessHitTestBrowserTest,
-                       ScrolledNestedPopupMenuTest) {
+                       DISABLED_ScrolledNestedPopupMenuTest) {
   GURL main_url(embedded_test_server()->GetURL(
       "a.com", "/frame_tree/page_with_tall_positioned_frame.html"));
   EXPECT_TRUE(NavigateToURL(shell(), main_url));