[Sync] Disable flaky bookmarks tests

Flakiness mostly occurs on TSAN* builders, so just disable on them.
There are two more flaky bookmarks tests:
SingleClientBookmarksSyncTest.ApplyRemoteCreationWithoutValidGUIDOrOCII
SingleClientBookmarksSyncTest.ApplyRemoteCreationWithoutValidGUID
But they have less scores and fails on ASAN* as well, so we don't
disable them in this CL.

Bug: 1012223, 1012222
Change-Id: I38374ee2b27585f34714699abb8fbcba8d708402
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1850152
Commit-Queue: Mikel Astiz <mastiz@chromium.org>
Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Auto-Submit: Maksim Moskvitin <mmoskvitin@google.com>
Cr-Commit-Position: refs/heads/master@{#704320}

chrome/browser/sync/test/integration/single_client_bookmarks_sync_test.cc

@@ -787,6 +787,14 @@ IN_PROC_BROWSER_TEST_P(SingleClientBookmarksSyncTest,
                                          /*REMOTE_INITIAL_UPDATE=*/5));
 }
 
+// TODO(crbug.com/1012222): re-enable this test on all builders once flakiness
+// is addressed.
+#if defined(THREAD_SANITIZER)
+#define MAYBE_ApplyRemoteCreationWithValidGUID \
+  DISABLED_ApplyRemoteCreationWithValidGUID
+#else
+#define MAYBE_ApplyRemoteCreationWithValidGUID ApplyRemoteCreationWithValidGUID
+#endif
 IN_PROC_BROWSER_TEST_P(SingleClientBookmarksSyncTest,
                        ApplyRemoteCreationWithValidGUID) {
   // This test is only relevant for USS code path.
@@ -991,8 +999,16 @@ IN_PROC_BROWSER_TEST_P(SingleClientBookmarksSyncTest,
                                             originator_client_item_id));
 }
 
+// TODO(crbug.com/1012223): re-enable this test on all builders once flakiness
+// is addressed.
+#if defined(THREAD_SANITIZER)
+#define MAYBE_ApplyRemoteUpdateWithValidGUID \
+  DISABLED_ApplyRemoteUpdateWithValidGUID
+#else
+#define MAYBE_ApplyRemoteUpdateWithValidGUID ApplyRemoteUpdateWithValidGUID
+#endif
 IN_PROC_BROWSER_TEST_P(SingleClientBookmarksSyncTest,
-                       ApplyRemoteUpdateWithValidGUID) {
+                       MAYBE_ApplyRemoteUpdateWithValidGUID) {
   // This test is only relevant for USS code path and when BookmarkNode GUID
   // replacement is enabled.
   if (!base::FeatureList::IsEnabled(switches::kSyncUSSBookmarks))