WIP: Pref service: use the incognito support from Chrome

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 257638ab3424bdcc734f6d35e93697a32f9f8bf5..6ba53caa3bf2d959512aac436beffeebcfbd5da4 100644
--- a/chrome/browser/prefs/browser_prefs.h
+++ b/chrome/browser/prefs/browser_prefs.h
@@ -50,10 +50,15 @@ void MigrateObsoleteProfilePrefs(Profile* profile);
 // The pref stores Chrome expects to exist.
 std::set<PrefValueStore::PrefStoreType> ExpectedPrefStores();
 
+// The pref stores Chrome expects to exist for incognito.
+std::set<PrefValueStore::PrefStoreType> ExpectedIncognitoPrefStores();
+
 // The pref stores Chrome creates in-process (and thus doesn't need to connect
 // to through the pref service).
 std::set<PrefValueStore::PrefStoreType> InProcessPrefStores();
 
+std::set<PrefValueStore::PrefStoreType> InProcessIncognitoPrefStores();
+
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_PREFS_BROWSER_PREFS_H_