Temporarily disable flaky BackgroundSyncManagerTest.

TBR=nator, peter

Bug: 944871
Change-Id: I873d0ae11b3c8226615dbc8917726a58dbf38003
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1536446
Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643553}
diff --git a/content/browser/background_sync/background_sync_manager_unittest.cc b/content/browser/background_sync/background_sync_manager_unittest.cc
index 271cdd71..b3bb84da 100644
--- a/content/browser/background_sync/background_sync_manager_unittest.cc
+++ b/content/browser/background_sync/background_sync_manager_unittest.cc
@@ -1249,7 +1249,9 @@
             GetController()->registration_origin());
 }
 
-TEST_F(BackgroundSyncManagerTest, WakeBrowserCalled) {
+// TODO(https://crbug.com/944871): Flakes after setting CONNECTION_WIFI, on
+// some bots.
+TEST_F(BackgroundSyncManagerTest, DISABLED_WakeBrowserCalled) {
   InitDelayedSyncEventTest();
 
   // The BackgroundSyncManager should declare in initialization