Disable TwoClientWebAppsBMOSyncTest.UninstallSynced on Linux TSan

There's been a spike of flakes on this bot following 2020-12-03, let's disable the test.

https://findit-for-me.appspot.com/p/chromium/flake-portal/flakes/occurrences?key=ag9zfmZpbmRpdC1mb3ItbWVyVgsSBUZsYWtlIktjaHJvbWl1bUBzeW5jX2ludGVncmF0aW9uX3Rlc3RzQFR3b0NsaWVudFdlYkFwcHNCTU9TeW5jVGVzdC5Vbmluc3RhbGxTeW5jZWQM

Bug: 1108172
Change-Id: I3c142419ee690165bde93c9d84fe94a4225a18f7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2577358
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Auto-Submit: Victor Vianna <victorvianna@google.com>
Reviewed-by: Jan Krcal <jkrcal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#834184}

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

@@ -524,7 +524,13 @@ IN_PROC_BROWSER_TEST_F(TwoClientWebAppsBMOSyncTest, AppSortingFixCollisions) {
             GetAppSorting(GetProfile(0))->GetAppLaunchOrdinal(app_id2));
 }
 
-IN_PROC_BROWSER_TEST_F(TwoClientWebAppsBMOSyncTest, UninstallSynced) {
+// Flaky on Linux TSan (crbug.com/1108172).
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS) && defined(THREAD_SANITIZER)
+#define MAYBE_UninstallSynced DISABLED_UninstallSynced
+#else
+#define MAYBE_UninstallSynced UninstallSynced
+#endif
+IN_PROC_BROWSER_TEST_F(TwoClientWebAppsBMOSyncTest, MAYBE_UninstallSynced) {
   ASSERT_TRUE(SetupSync());
   ASSERT_TRUE(AllProfilesHaveSameWebAppIds());
   ASSERT_TRUE(embedded_test_server()->Start());