[Sync] Mark SingleClientBookmarkSyncTest.OfflineToOnline as FLAKY

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

Index: chrome/browser/sync/test/integration/single_client_bookmarks_sync_test.cc
diff --git a/chrome/browser/sync/test/integration/single_client_bookmarks_sync_test.cc b/chrome/browser/sync/test/integration/single_client_bookmarks_sync_test.cc
index cd8590c05437570b01453d897aef405a5850ca1f..009f33a8bd54ba7c29bcc2cfdbd911e3fbeeeba1 100644
--- a/chrome/browser/sync/test/integration/single_client_bookmarks_sync_test.cc
+++ b/chrome/browser/sync/test/integration/single_client_bookmarks_sync_test.cc
@@ -25,7 +25,8 @@ class SingleClientBookmarksSyncTest : public SyncTest {
   DISALLOW_COPY_AND_ASSIGN(SingleClientBookmarksSyncTest);
 };
 
-IN_PROC_BROWSER_TEST_F(SingleClientBookmarksSyncTest, OfflineToOnline) {
+// This test is flaky; http://crbug.com/105902.
+IN_PROC_BROWSER_TEST_F(SingleClientBookmarksSyncTest, FLAKY_OfflineToOnline) {
   ASSERT_TRUE(SetupSync()) << "SetupSync() failed.";
 
   DisableNetwork(GetProfile(0));