Disable flaky NetworkServiceRestartBrowserTest.BrowserIOFactoryAfterStoragePartitionGone.

TBR=chongz@chromium.org, kinuko@chromium.org
BUG=822891

Change-Id: I4f37f4b6309dbafc9d6081ffdadd44f821dd74e7
Reviewed-on: https://chromium-review.googlesource.com/967097Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Commit-Queue: Karan Bhatia <karandeepb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543839}

content/browser/network_service_restart_browsertest.cc

@@ -555,8 +555,9 @@ IN_PROC_BROWSER_TEST_F(NetworkServiceRestartBrowserTest,
 // Make sure the factory returned from
 // |StoragePartition::GetURLLoaderFactoryForBrowserProcessIOThread()| doesn't
 // crash if it's called after the StoragePartition is deleted.
+// TODO(crbug.com/822891): Disabled since flaky.
 IN_PROC_BROWSER_TEST_F(NetworkServiceRestartBrowserTest,
-                       BrowserIOFactoryAfterStoragePartitionGone) {
+                       DISABLED_BrowserIOFactoryAfterStoragePartitionGone) {
   base::ScopedAllowBlockingForTesting allow_blocking;
   std::unique_ptr<ShellBrowserContext> browser_context =
       std::make_unique<ShellBrowserContext>(true, nullptr);