Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/metrics/variations/variations_service.cc

Index: chrome/browser/metrics/variations/variations_service.cc
diff --git a/chrome/browser/metrics/variations/variations_service.cc b/chrome/browser/metrics/variations/variations_service.cc
index 82b751050c7f361dc0c06ddddebff08bb3699da9..60d8910b04a9a4322fcb6dce0f435223b7bc1361 100644
--- a/chrome/browser/metrics/variations/variations_service.cc
+++ b/chrome/browser/metrics/variations/variations_service.cc
@@ -15,6 +15,7 @@
 #include "base/version.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/metrics/proto/trials_seed.pb.h"
+#include "chrome/browser/prefs/pref_registry_simple.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/metrics/variations/variations_util.h"
@@ -198,8 +199,9 @@ void VariationsService::SetCreateTrialsFromSeedCalledForTesting(bool called) {
 }
 
 // static
-void VariationsService::RegisterPrefs(PrefServiceSimple* prefs) {
-  prefs->RegisterStringPref(prefs::kVariationsSeed, std::string());
+void VariationsService::RegisterPrefs(PrefRegistrySimple* prefs) {
+  prefs

[Mattias Nissler (ping if slow), 2013/01/31 13:06:25]

remove accidental newline.

[Jói, 2013/01/31 13:43:42]

Done. Found a couple of other places like this while renaming params to registry
and fixed those too.

+->RegisterStringPref(prefs::kVariationsSeed, std::string());
   prefs->RegisterInt64Pref(prefs::kVariationsSeedDate,
                            base::Time().ToInternalValue());
 }