Sheriff: Disable flaky BookmarkBrowsertest.Persist on Windows

TBR=sky@chromium.org

Bug: 813759
Change-Id: I5896d323742aa3811d0a96a972d7ea4e7cd90769
Reviewed-on: https://chromium-review.googlesource.com/927454Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Tommy Li <tommycli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537923}

chrome/browser/ui/bookmarks/bookmark_browsertest.cc

@@ -114,9 +114,10 @@ IN_PROC_BROWSER_TEST_F(BookmarkBrowsertest, PRE_Persist) {
                                 base::ASCIIToUTF16(kPersistBookmarkTitle));
 }
 
-#if defined(THREAD_SANITIZER)
+#if defined(THREAD_SANITIZER) || defined(OS_WIN)
 // BookmarkBrowsertest.Persist fails under ThreadSanitizer on Linux, see
 // http://crbug.com/340223.
+// Also flaky under Windows. See crbug.com/813759.
 #define MAYBE_Persist DISABLED_Persist
 #else
 #define MAYBE_Persist Persist