Fixed regression: various preferences were not persisted when changed from incognito window

chrome/common/pref_store.h

Index: chrome/common/pref_store.h
diff --git a/chrome/common/pref_store.h b/chrome/common/pref_store.h
index bc74af110b83f3dd602e00a767a2109c8728af62..5e8b2c5964285f1e75f5a97f1baddd7d1194cee6 100644
--- a/chrome/common/pref_store.h
+++ b/chrome/common/pref_store.h
@@ -54,9 +54,9 @@ class PrefStore : public base::RefCounted<PrefStore> {
   // Whether the store has completed all asynchronous initialization.
   virtual bool IsInitializationComplete() const;
 
-  // Get the value for a given preference |key| and stores it in |result|.
-  // |result| is only modified if the return value is READ_OK. Ownership of the
-  // |result| value remains with the PrefStore.
+  // Get the value for a given preference |key| and stores it in |*result|.
+  // |*result| is only modified if the return value is READ_OK and if |result|
+  // is not NULL. Ownership of the |*result| value remains with the PrefStore.
   virtual ReadResult GetValue(const std::string& key,
                               const base::Value** result) const = 0;