Refactor preference syncing.

chrome/browser/instant/promo_counter.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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/instant/promo_counter.h"
 
 #include "base/metrics/histogram.h"
 #include "base/values.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 
@@ skipping 20 matching lines @@
       did_init_(false),
       show_(false) {
 }
 
 PromoCounter::~PromoCounter() {
 }
 
 // static
 void PromoCounter::RegisterUserPrefs(PrefService* prefs,
                                      const std::string& base_key) {
-  prefs->RegisterBooleanPref((base_key + kShowKey).c_str(), true);
-  prefs->RegisterIntegerPref((base_key + kNumSessionsKey).c_str(), 0);
-  prefs->RegisterInt64Pref((base_key + kInitialTimeKey).c_str(), 0);
+  prefs->RegisterBooleanPref((base_key + kShowKey).c_str(),
+                             true,
+                             PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterIntegerPref((base_key + kNumSessionsKey).c_str(),
+                             0,
+                             PrefService::UNSYNCABLE_PREF);
+  prefs->RegisterInt64Pref((base_key + kInitialTimeKey).c_str(),
+                           0,
+                           PrefService::UNSYNCABLE_PREF);
 }
 
 bool PromoCounter::ShouldShow(base::Time current_time) {
   if (!did_init_) {
     did_init_ = true;
     Init(current_time);
   }
 
   if (show_ && (current_time - initial_show_).InDays() >= max_days_)
     MaxTimeLapsed(current_time);
@@ skipping 51 matching lines @@
 }
 
 void PromoCounter::MaxTimeLapsed(base::Time current_time) {
   show_ = false;
   UMA_HISTOGRAM_CUSTOM_COUNTS(histogram_key_ + kHistogramMaxTime,
                               (current_time - initial_show_).InHours(),
                               1, max_days_ * 24, 24);
   if (profile_->GetPrefs())
     profile_->GetPrefs()->SetBoolean((pref_key_ + kShowKey).c_str(), false);
 }