Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/renderer_host/web_cache_manager.cc

Index: chrome/browser/renderer_host/web_cache_manager.cc
diff --git a/chrome/browser/renderer_host/web_cache_manager.cc b/chrome/browser/renderer_host/web_cache_manager.cc
index 0a13f889603732ce659cbede1311905d8c0cc12b..83af893c75eb4cade58e2a5f35c7ed0d9a044396 100644
--- a/chrome/browser/renderer_host/web_cache_manager.cc
+++ b/chrome/browser/renderer_host/web_cache_manager.cc
@@ -14,6 +14,7 @@
 #include "base/sys_info.h"
 #include "base/time.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/prefs/pref_registry_simple.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -53,7 +54,7 @@ int GetDefaultCacheSize() {
 }  // anonymous namespace
 
 // static
-void WebCacheManager::RegisterPrefs(PrefServiceSimple* prefs) {
+void WebCacheManager::RegisterPrefs(PrefRegistrySimple* prefs) {
   prefs->RegisterIntegerPref(prefs::kMemoryCacheSize, GetDefaultCacheSize());
 }