Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/ui/gtk/browser_window_gtk.cc

Index: chrome/browser/ui/gtk/browser_window_gtk.cc
diff --git a/chrome/browser/ui/gtk/browser_window_gtk.cc b/chrome/browser/ui/gtk/browser_window_gtk.cc
index 98be394039ba97476725e3f0ae67ad97546f0d83..9805f8d7aa753b50cc7d63bd03ee14e5dc569c4f 100644
--- a/chrome/browser/ui/gtk/browser_window_gtk.cc
+++ b/chrome/browser/ui/gtk/browser_window_gtk.cc
@@ -1496,7 +1496,7 @@ GtkWidget* BrowserWindowGtk::titlebar_widget() const {
 }
 
 // static
-void BrowserWindowGtk::RegisterUserPrefs(PrefService* prefs) {
+void BrowserWindowGtk::RegisterUserPrefs(PrefServiceSyncable* prefs) {
   bool custom_frame_default = false;
   // Avoid checking the window manager if we're not connected to an X server (as
   // is the case in Valgrind tests).
@@ -1506,7 +1506,7 @@ void BrowserWindowGtk::RegisterUserPrefs(PrefService* prefs) {
   }
   prefs->RegisterBooleanPref(prefs::kUseCustomChromeFrame,
                              custom_frame_default,
-                             PrefService::SYNCABLE_PREF);
+                             PrefServiceSyncable::SYNCABLE_PREF);
 }
 
 WebContents* BrowserWindowGtk::GetDisplayedTab() {