[sheriff] Disable AutofillInteractiveTest.PrefillFormAndFill on Mac.

TBR=dvadym@chromium.org
R=dvadym@chromium.org

Bug: 1045545
Change-Id: Iaa0b63e95748d488dc97b07087c4852e981b5d0b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2019886Reviewed-by: François Doray <fdoray@chromium.org>
Commit-Queue: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735069}

chrome/browser/autofill/autofill_interactive_uitest.cc

@@ -895,7 +895,13 @@ IN_PROC_BROWSER_TEST_F(AutofillInteractiveTest, ModifySelectFieldAndFill) {
 }
 
 // Test that autofill works when the website prefills the form.
-IN_PROC_BROWSER_TEST_F(AutofillInteractiveTest, PrefillFormAndFill) {
+#if defined(OS_MACOSX)
+// Flaky on Mac https://crbug.com/1045545
+#define MAYBE_PrefillFormAndFill DISABLED_PrefillFormAndFill
+#else
+#define MAYBE_PrefillFormAndFill PrefillFormAndFill
+#endif
+IN_PROC_BROWSER_TEST_F(AutofillInteractiveTest, MAYBE_PrefillFormAndFill) {
   const char kPrefillScript[] =
       "<script>"
       "document.getElementById('firstname').value = 'Seb';"