Pref service: have Mash and Chrome connect to the right pref stores

chrome/browser/prefs/browser_prefs.h

Index: chrome/browser/prefs/browser_prefs.h
diff --git a/chrome/browser/prefs/browser_prefs.h b/chrome/browser/prefs/browser_prefs.h
index 89a5e2d74cb9cd1a1e046aec47f948b16f74e521..257638ab3424bdcc734f6d35e93697a32f9f8bf5 100644
--- a/chrome/browser/prefs/browser_prefs.h
+++ b/chrome/browser/prefs/browser_prefs.h
@@ -5,7 +5,10 @@
 #ifndef CHROME_BROWSER_PREFS_BROWSER_PREFS_H_
 #define CHROME_BROWSER_PREFS_BROWSER_PREFS_H_
 
+#include <set>
+
 #include "build/build_config.h"
+#include "components/prefs/pref_value_store.h"
 
 class PrefRegistrySimple;
 class PrefService;
@@ -44,6 +47,13 @@ void MigrateObsoleteBrowserPrefs(Profile* profile, PrefService* local_state);
 // should remain *the* place to drop deprecated profile prefs at.
 void MigrateObsoleteProfilePrefs(Profile* profile);
 
+// The pref stores Chrome expects to exist.
+std::set<PrefValueStore::PrefStoreType> ExpectedPrefStores();
+
+// The pref stores Chrome creates in-process (and thus doesn't need to connect
+// to through the pref service).
+std::set<PrefValueStore::PrefStoreType> InProcessPrefStores();
+
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_PREFS_BROWSER_PREFS_H_