[Sync] Refactoring of sync integration test checkers to remove boilerplate await methods.

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

 // Copyright 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 <stddef.h>
 
 #include "base/command_line.h"
 #include "base/macros.h"
-#include "chrome/browser/sync/test/integration/sync_integration_test_util.h"
 #include "chrome/browser/sync/test/integration/sync_test.h"
+#include "chrome/browser/sync/test/integration/updated_progress_marker_checker.h"
 #include "chrome/browser/sync/test/integration/wifi_credentials_helper.h"
 #include "chrome/common/chrome_switches.h"
 #include "components/browser_sync/browser_sync_switches.h"
 #include "components/wifi_sync/wifi_credential.h"
 #include "components/wifi_sync/wifi_security_class.h"
 
-using sync_integration_test_util::AwaitCommitActivityCompletion;
 using wifi_sync::WifiCredential;
 
 using WifiCredentialSet = wifi_sync::WifiCredential::CredentialSet;
 
 class SingleClientWifiCredentialsSyncTest : public SyncTest {
  public:
   SingleClientWifiCredentialsSyncTest() : SyncTest(SINGLE_CLIENT) {}
   ~SingleClientWifiCredentialsSyncTest() override {}
 
   // SyncTest implementation.
@@ skipping 36 matching lines @@
   const size_t profile_index = 0;
   wifi_credentials_helper::AddWifiCredential(
       profile_index, "fake_id", *credential);
 
   const WifiCredentialSet verifier_credentials =
       wifi_credentials_helper::GetWifiCredentialsForProfile(verifier());
   EXPECT_EQ(1U, verifier_credentials.size());
   EXPECT_EQ(WifiCredential::MakeSsidBytesForTest(ssid),
             verifier_credentials.begin()->ssid());
 
-  ASSERT_TRUE(AwaitCommitActivityCompletion(GetSyncService(profile_index)));
+  ASSERT_TRUE(
+      UpdatedProgressMarkerChecker(GetSyncService(profile_index)).Wait());
   EXPECT_TRUE(wifi_credentials_helper::ProfileMatchesVerifier(profile_index));
 }