Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/signin/about_signin_internals_factory.cc

Index: chrome/browser/signin/about_signin_internals_factory.cc
diff --git a/chrome/browser/signin/about_signin_internals_factory.cc b/chrome/browser/signin/about_signin_internals_factory.cc
index 310285725be52d02efe46db2a318370cc5cde1f0..2628042c39688b521cb774dfc7ae470cac7e3803 100644
--- a/chrome/browser/signin/about_signin_internals_factory.cc
+++ b/chrome/browser/signin/about_signin_internals_factory.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/signin/about_signin_internals_factory.h"
 
+#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 #include "chrome/browser/signin/about_signin_internals.h"
@@ -36,13 +37,13 @@ AboutSigninInternalsFactory* AboutSigninInternalsFactory::GetInstance() {
 }
 
 void AboutSigninInternalsFactory::RegisterUserPrefs(
-    PrefServiceSyncable* user_prefs) {
+    PrefRegistrySyncable* user_prefs) {
   // SigninManager information for about:signin-internals.
   for (int i = UNTIMED_FIELDS_BEGIN; i < UNTIMED_FIELDS_END; ++i) {
     const std::string pref_path = SigninStatusFieldToString(
         static_cast<UntimedSigninStatusField>(i));
     user_prefs->RegisterStringPref(pref_path.c_str(), "",
-                                   PrefServiceSyncable::UNSYNCABLE_PREF);
+                                   PrefRegistrySyncable::UNSYNCABLE_PREF);
   }
   for (int i = TIMED_FIELDS_BEGIN; i < TIMED_FIELDS_END; ++i) {
     const std::string value = SigninStatusFieldToString(
@@ -50,9 +51,9 @@ void AboutSigninInternalsFactory::RegisterUserPrefs(
     const std::string time = SigninStatusFieldToString(
         static_cast<TimedSigninStatusField>(i)) + ".time";
     user_prefs->RegisterStringPref(value.c_str(), "",
-                                   PrefServiceSyncable::UNSYNCABLE_PREF);
+                                   PrefRegistrySyncable::UNSYNCABLE_PREF);
     user_prefs->RegisterStringPref(time.c_str(), "",
-                                   PrefServiceSyncable::UNSYNCABLE_PREF);
+                                   PrefRegistrySyncable::UNSYNCABLE_PREF);
   }
   // TokenService information for about:signin-internals.
   for (size_t i = 0; i < kNumTokenPrefs; i++) {
@@ -61,11 +62,11 @@ void AboutSigninInternalsFactory::RegisterUserPrefs(
     const std::string status = pref + ".status";
     const std::string time = pref + ".time";
     user_prefs->RegisterStringPref(value.c_str(), "",
-                                   PrefServiceSyncable::UNSYNCABLE_PREF);
+                                   PrefRegistrySyncable::UNSYNCABLE_PREF);
     user_prefs->RegisterStringPref(status.c_str(), "",
-                                   PrefServiceSyncable::UNSYNCABLE_PREF);
+                                   PrefRegistrySyncable::UNSYNCABLE_PREF);
     user_prefs->RegisterStringPref(time.c_str(), "",
-                                   PrefServiceSyncable::UNSYNCABLE_PREF);
+                                   PrefRegistrySyncable::UNSYNCABLE_PREF);
   }
 }