Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/browser_shutdown.cc

Index: chrome/browser/browser_shutdown.cc
diff --git a/chrome/browser/browser_shutdown.cc b/chrome/browser/browser_shutdown.cc
index 88d5ce1ba20295bbb5520ad3d13e88a94fed3bc9..b5bc5b86c203bcda81ca586e79bc02d2f0b1a27e 100644
--- a/chrome/browser/browser_shutdown.cc
+++ b/chrome/browser/browser_shutdown.cc
@@ -26,6 +26,7 @@
 #include "chrome/browser/jankometer.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/metrics/metrics_service.h"
+#include "chrome/browser/prefs/pref_registry_simple.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/service/service_process_control.h"
@@ -77,7 +78,7 @@ int shutdown_num_processes_slow_;
 
 const char kShutdownMsFile[] = "chrome_shutdown_ms.txt";
 
-void RegisterPrefs(PrefServiceSimple* local_state) {
+void RegisterPrefs(PrefRegistrySimple* local_state) {

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

I could nit here (and elsewhere) that the parameter name should be |registry|,
but I don't care much. Up to you.

[Jói, 2013/01/31 13:43:42]

I was thinking I might leave it, but nicer to do it right :)  Fixed.

   local_state->RegisterIntegerPref(prefs::kShutdownType, NOT_VALID);
   local_state->RegisterIntegerPref(prefs::kShutdownNumProcesses, 0);
   local_state->RegisterIntegerPref(prefs::kShutdownNumProcessesSlow, 0);