Refactor preference syncing.

chrome/browser/web_resource/gpu_blacklist_updater.cc

 // 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/web_resource/gpu_blacklist_updater.h"
 
 #include "base/logging.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ skipping 29 matching lines @@
                          false,  // don't append locale to URL
                          NotificationType::NOTIFICATION_TYPE_COUNT,
                          prefs::kGpuBlacklistUpdate,
                          kStartGpuBlacklistFetchDelay,
                          kCacheUpdateDelay),
       gpu_blacklist_cache_(NULL) {
   PrefService* local_state = g_browser_process->local_state();
   // If we bring up chrome normally, prefs should never be NULL; however, we
   // we handle the case where local_state == NULL for certain tests.
   if (local_state) {
-    local_state->RegisterDictionaryPref(prefs::kGpuBlacklist);
+    local_state->RegisterDictionaryPref(prefs::kGpuBlacklist,
+                                        false /* don't sync pref */);
     gpu_blacklist_cache_ = local_state->GetDictionary(prefs::kGpuBlacklist);
-    DCHECK(gpu_blacklist_cache_);   
+    DCHECK(gpu_blacklist_cache_);
   }
 
   LoadGpuBlacklist();
 }
 
 GpuBlacklistUpdater::~GpuBlacklistUpdater() { }
 
 void GpuBlacklistUpdater::Unpack(const DictionaryValue& parsed_json) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DictionaryPrefUpdate update(prefs_, prefs::kGpuBlacklist);
@@ skipping 53 matching lines @@
         }
       }
     }
   }
 
   // Need to initialize GpuDataManager to load the current GPU blacklist,
   // collect preliminary GPU info, and run through GPU blacklist.
   GpuDataManager* gpu_data_manager = GpuDataManager::GetInstance();
   gpu_data_manager->UpdateGpuBlacklist(gpu_blacklist.release());
 }