Disable flaky RecreateMainFrameAfterCancelPending

Bug: 1104826
Change-Id: I8d4ea71bb0dc7cdaae7458182a221bd09e04de3a
Tbr: kenrb@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2315812Reviewed-by: Dan H <harringtond@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Commit-Queue: Dan H <harringtond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791558}

content/browser/site_per_process_browsertest.cc

@@ -8722,8 +8722,9 @@ IN_PROC_BROWSER_TEST_P(SitePerProcessBrowserTest,
 // same site as the canceled RFH doesn't lead to a renderer crash.  The steps
 // here are similar to ReuseNonLiveRenderViewHostAfterCancelPending, but don't
 // involve crashing the renderer. See https://crbug.com/651980.
+// Flaky on all platforms, see https://crbug.com/1104826.
 IN_PROC_BROWSER_TEST_P(SitePerProcessBrowserTest,
-                       RecreateMainFrameAfterCancelPending) {
+                       DISABLED_RecreateMainFrameAfterCancelPending) {
   GURL a_url(embedded_test_server()->GetURL("a.com", "/title1.html"));
   GURL b_url(embedded_test_server()->GetURL("b.com", "/title2.html"));
   GURL c_url(embedded_test_server()->GetURL("c.com", "/title3.html"));