Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/metrics/metrics_log.cc

 // Copyright (c) 2012 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/metrics_log.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 260 matching lines @@
 
 static base::LazyInstance<std::string>::Leaky
   g_version_extension = LAZY_INSTANCE_INITIALIZER;
 
 MetricsLog::MetricsLog(const std::string& client_id, int session_id)
     : MetricsLogBase(client_id, session_id, MetricsLog::GetVersionString()) {}
 
 MetricsLog::~MetricsLog() {}
 
 // static
-void MetricsLog::RegisterPrefs(PrefService* local_state) {
+void MetricsLog::RegisterPrefs(PrefServiceSimple* local_state) {
   local_state->RegisterListPref(prefs::kStabilityPluginStats);
 }
 
 // static
 int64 MetricsLog::GetIncrementalUptime(PrefService* pref) {
   base::TimeTicks now = base::TimeTicks::Now();
   static base::TimeTicks last_updated_time(now);
   int64 incremental_time = (now - last_updated_time).InSeconds();
   last_updated_time = now;
 
@@ skipping 737 matching lines @@
     ProductDataToProto(google_update_metrics.google_update_data,
                        google_update->mutable_google_update_status());
   }
 
   if (!google_update_metrics.product_data.version.empty()) {
     ProductDataToProto(google_update_metrics.product_data,
                        google_update->mutable_client_status());
   }
 #endif  // defined(GOOGLE_CHROME_BUILD) && defined(OS_WIN)
 }