Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/extensions/extension_prefs.cc

Index: chrome/browser/extensions/extension_prefs.cc
diff --git a/chrome/browser/extensions/extension_prefs.cc b/chrome/browser/extensions/extension_prefs.cc
index 1612243fc70fdb06234e3cff3d841314767fc2be..7c81209682559155b3f0457561f19107d06cd3f3 100644
--- a/chrome/browser/extensions/extension_prefs.cc
+++ b/chrome/browser/extensions/extension_prefs.cc
@@ -2235,47 +2235,51 @@ bool ExtensionPrefs::NeedsStorageGarbageCollection() {
 }
 
 // static
-void ExtensionPrefs::RegisterUserPrefs(PrefService* prefs) {
-  prefs->RegisterDictionaryPref(kExtensionsPref, PrefService::UNSYNCABLE_PREF);
-  prefs->RegisterListPref(kExtensionToolbar, PrefService::UNSYNCABLE_PREF);
-  prefs->RegisterListPref(kExtensionActionBox, PrefService::UNSYNCABLE_PREF);
-  prefs->RegisterListPref(kExtensionActionBoxBar, PrefService::UNSYNCABLE_PREF);
+void ExtensionPrefs::RegisterUserPrefs(PrefServiceSyncable* prefs) {
+  prefs->RegisterDictionaryPref(kExtensionsPref,
+                                PrefServiceSyncable::UNSYNCABLE_PREF);
+  prefs->RegisterListPref(kExtensionToolbar,
+                          PrefServiceSyncable::UNSYNCABLE_PREF);
+  prefs->RegisterListPref(kExtensionActionBox,
+                          PrefServiceSyncable::UNSYNCABLE_PREF);
+  prefs->RegisterListPref(kExtensionActionBoxBar,
+                          PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterIntegerPref(prefs::kExtensionToolbarSize,
                              -1,  // default value
-                             PrefService::UNSYNCABLE_PREF);
+                             PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterDictionaryPref(kExtensionsBlacklistUpdate,
-                                PrefService::UNSYNCABLE_PREF);
+                                PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterListPref(prefs::kExtensionInstallAllowList,
-                          PrefService::UNSYNCABLE_PREF);
+                          PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterListPref(prefs::kExtensionInstallDenyList,
-                          PrefService::UNSYNCABLE_PREF);
+                          PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterListPref(prefs::kExtensionInstallForceList,
-                          PrefService::UNSYNCABLE_PREF);
+                          PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterListPref(prefs::kExtensionAllowedTypes,
-                          PrefService::UNSYNCABLE_PREF);
+                          PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterStringPref(kWebStoreLogin,
                             std::string(),  // default value
-                            PrefService::UNSYNCABLE_PREF);
+                            PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterStringPref(prefs::kExtensionBlacklistUpdateVersion,
                             "0",  // default value
-                            PrefService::UNSYNCABLE_PREF);
+                            PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kExtensionStorageGarbageCollect,
                              false,  // default value
-                             PrefService::UNSYNCABLE_PREF);
+                             PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterInt64Pref(prefs::kLastExtensionsUpdateCheck,
                            0,  // default value
-                           PrefService::UNSYNCABLE_PREF);
+                           PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterInt64Pref(prefs::kNextExtensionsUpdateCheck,
                            0,  // default value
-                           PrefService::UNSYNCABLE_PREF);
+                           PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterListPref(prefs::kExtensionAllowedInstallSites,
-                          PrefService::UNSYNCABLE_PREF);
+                          PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterStringPref(kExtensionsLastChromeVersion,
                             std::string(),  // default value
-                            PrefService::UNSYNCABLE_PREF);
+                            PrefServiceSyncable::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(kSideloadWipeoutDone,
                              false,
-                             PrefService::UNSYNCABLE_PREF);
+                             PrefServiceSyncable::UNSYNCABLE_PREF);
 }
 
 ExtensionIdList ExtensionPrefs::GetExtensionPrefAsVector(