[Sheriff] Disable SingleClientSessionsSyncTest.NavigationChainAlteredDestructively.

Disable SingleClientSessionsSyncTest.NavigationChainAlteredDestructively
on Win and Linux (flaky).

TBR=frechette@chromium.org

Bug: 972871
Change-Id: I0d3b400c1465ed1b728ce186c011d7dcdffbc669
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1729220Reviewed-by: vitaliii <vitaliii@chromium.org>
Commit-Queue: vitaliii <vitaliii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682715}

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

@@ -514,8 +514,9 @@ IN_PROC_BROWSER_TEST_F(SingleClientSessionsSyncTest,
   ExpectNavigationChain({first_url, second_url});
 }
 
+// TODO(crbug.com/972871): Fails or crashes on all platforms flakily.
 IN_PROC_BROWSER_TEST_F(SingleClientSessionsSyncTest,
-                       NavigationChainAlteredDestructively) {
+                       DISABLED_NavigationChainAlteredDestructively) {
   ASSERT_TRUE(SetupSync()) << "SetupSync() failed.";
   ASSERT_TRUE(CheckInitialState(0));