Disable flaky WebViewFocusInteractiveTest.Focus_FocusBeforeNavigation.

TBR=lfg@chromium.org

Bug: 1013552
Change-Id: Id611e5b94fc593b6fc48602d4bebbb7b4a35549d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1857540Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705316}

chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc

@@ -775,8 +775,9 @@ IN_PROC_BROWSER_TEST_F(WebViewPointerLockInteractiveTest,
 
 // Tests that if a <webview> is focused before navigation then the guest starts
 // off focused.
+// Flaky. https://crbug.com/1013552
 IN_PROC_BROWSER_TEST_F(WebViewFocusInteractiveTest,
-                       Focus_FocusBeforeNavigation) {
+                       DISABLED_Focus_FocusBeforeNavigation) {
   TestHelper("testFocusBeforeNavigation", "web_view/focus", NO_TEST_SERVER);
 }