Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/extensions/api/commands/command_service.cc

Index: chrome/browser/extensions/api/commands/command_service.cc
diff --git a/chrome/browser/extensions/api/commands/command_service.cc b/chrome/browser/extensions/api/commands/command_service.cc
index c4967fdd341ee5bc606c677a03785b82c4bc2c12..ba37a10dd1986b28cf3c96a2b7a446c785dbb17a 100644
--- a/chrome/browser/extensions/api/commands/command_service.cc
+++ b/chrome/browser/extensions/api/commands/command_service.cc
@@ -35,10 +35,9 @@ std::string GetPlatformKeybindingKeyForAccelerator(
 namespace extensions {
 
 // static
-void CommandService::RegisterUserPrefs(
-  PrefService* user_prefs) {
-      user_prefs->RegisterDictionaryPref(prefs::kExtensionCommands,
-                                         PrefService::SYNCABLE_PREF);
+void CommandService::RegisterUserPrefs(PrefServiceSyncable* user_prefs) {
+  user_prefs->RegisterDictionaryPref(prefs::kExtensionCommands,
+                                     PrefServiceSyncable::SYNCABLE_PREF);
 }
 
 CommandService::CommandService(Profile* profile)