[fuchsia] Disable flaky AutoplayTest.

Bug: 1162433
Change-Id: I7b40969219f46c39b3be550724f53b2e544f4d9e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2640493
Commit-Queue: Wez <wez@chromium.org>
Commit-Queue: Marina Ciocea <marinaciocea@chromium.org>
Auto-Submit: Wez <wez@chromium.org>
Reviewed-by: Marina Ciocea <marinaciocea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845151}

fuchsia/engine/browser/autoplay_browsertest.cc

@@ -49,9 +49,11 @@ class AutoplayTest : public cr_fuchsia::WebEngineBrowserTest {
   fuchsia::web::NavigationControllerPtr controller_;
 };
 
+// TODO(1162433): Flakily times-out, probably because URL will change as soon
+// as navigation is "committed", which happens before document load.
 IN_PROC_BROWSER_TEST_F(
     AutoplayTest,
-    UserActivationPolicy_UserActivatedViaSimulatedInteraction) {
+    DISABLED_UserActivationPolicy_UserActivatedViaSimulatedInteraction) {
   const GURL kUrl(embedded_test_server()->GetURL("/play_vp8.html?autoplay=1"));
 
   fuchsia::web::FramePtr frame =