Fix MetricsServiceClients to use SyncDisableObservers state.

chrome/browser/metrics/chrome_metrics_service_client.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 "chrome/browser/metrics/chrome_metrics_service_client.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <utility>
@@ skipping 944 matching lines @@
 void ChromeMetricsServiceClient::OnSyncPrefsChanged(bool must_purge) {
   if (!ukm_service_)
     return;
   if (must_purge) {
     ukm_service_->Purge();
     ukm_service_->ResetClientId();
   }
   // Signal service manager to enable/disable UKM based on new state.
   UpdateRunningServices();
 }
+
+bool ChromeMetricsServiceClient::IsHistorySyncEnabledOnAllProfiles() {
+  return SyncDisableObserver::IsHistorySyncEnabledOnAllProfiles();
+}