[sheriff] Disable NestedIframeTransformedIntoViewViewportIntersection

The test is flaky.

TBR=justinmiron@google.com

Bug: 1168036
Change-Id: I51e479cc3f30953bc33143dd723db96ee1be2a58
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2637634Reviewed-by: Rainhard Findling <rainhard@chromium.org>
Commit-Queue: Rainhard Findling <rainhard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844720}

content/browser/site_per_process_browsertest.cc

@@ -13187,8 +13187,10 @@ IN_PROC_BROWSER_TEST_P(SitePerProcessBrowserTest,
   EXPECT_TRUE(compositing_rect.Contains(visible_rect));
 }
 
-IN_PROC_BROWSER_TEST_P(SitePerProcessBrowserTest,
-                       NestedIframeTransformedIntoViewViewportIntersection) {
+// TODO(crbug.com/1168036): Flaky test.
+IN_PROC_BROWSER_TEST_P(
+    SitePerProcessBrowserTest,
+    DISABLED_NestedIframeTransformedIntoViewViewportIntersection) {
   GURL http_url(embedded_test_server()->GetURL(
       "a.com", "/frame_tree/page_with_frame_transformed_into_viewport.html"));
   EXPECT_TRUE(NavigateToURL(shell(), http_url));