Update chrome for new prefs location.

chrome/browser/metrics/chrome_metrics_service_accessor.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_accessor.h"
 
-#include "base/prefs/pref_service.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/common/features.h"
 #include "chrome/common/pref_names.h"
+#include "components/prefs/pref_service.h"
 #include "content/public/browser/browser_thread.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #endif
 
 // static
 bool ChromeMetricsServiceAccessor::IsMetricsAndCrashReportingEnabled() {
   // TODO(blundell): Fix the unittests that don't set up the UI thread and
   // change this to just be DCHECK_CURRENTLY_ON().
@@ skipping 34 matching lines @@
 }
 
 // static
 bool ChromeMetricsServiceAccessor::RegisterSyntheticFieldTrialWithNameHash(
     uint32_t trial_name_hash,
     const std::string& group_name) {
   return metrics::MetricsServiceAccessor::
       RegisterSyntheticFieldTrialWithNameHash(
           g_browser_process->metrics_service(), trial_name_hash, group_name);
 }