Add new E2E sync multi profiles tests. This should not affect any existing

chrome/browser/sync/test/integration/single_client_e2e_test.cc

 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/test/integration/sync_test.h"
 
 class SingleClientE2ETest : public SyncTest {
  public:
   SingleClientE2ETest() : SyncTest(SINGLE_CLIENT) {}
   ~SingleClientE2ETest() override {}
   virtual bool TestUsesSelfNotifications() override { return false; }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SingleClientE2ETest);
 };
 
+// http://crbug.com/431366
 IN_PROC_BROWSER_TEST_F(SingleClientE2ETest, DISABLED_SanitySetup) {
   ASSERT_TRUE(SetupSync()) <<  "SetupSync() failed.";
   // TODO(shadi): Add AwaitCommitActivityCompletion() once GCM servers are added
   // to E2E setup.
   // ASSERT_TRUE(AwaitCommitActivityCompletion(GetSyncService((0))));
 }