Separate storage for protected preferences into Protected Preferences file.

chrome/browser/prefs/pref_hash_filter.h

Index: chrome/browser/prefs/pref_hash_filter.h
diff --git a/chrome/browser/prefs/pref_hash_filter.h b/chrome/browser/prefs/pref_hash_filter.h
index 753293c2980c8848c639f563e882d7b619a9e9a0..342df4635177c7ff2836ed55ee963f41aa4072d2 100644
--- a/chrome/browser/prefs/pref_hash_filter.h
+++ b/chrome/browser/prefs/pref_hash_filter.h
@@ -19,6 +19,7 @@
 #include "chrome/browser/prefs/tracked/tracked_preference.h"
 
 class PrefService;
+class PersistentPrefStore;

[Bernhard Bauer, 2014/03/26 15:05:50]

Nit: Move before PrefService

[erikwright (departed), 2014/03/26 21:08:12]

Done.

 class PrefStore;
 
 namespace base {
@@ -83,6 +84,15 @@ class PrefHashFilter : public PrefFilter {
   // |pref_store|.
   void Initialize(const PrefStore& pref_store);
 
+  // Migrates protected values from |source| to |destination|. Values are
+  // migrated if they are protected according to this filter's configuration,
+  // the corresponding key has no value in |destination|, and the value in
+  // |source| is trusted according to this filter's PrefHashStore. Regardless of
+  // the state of |destination| or the trust status, the protected values will
+  // be removed from |source|.
+  void MigrateValues(PersistentPrefStore* source,
+                     PersistentPrefStore* destination);
+
   // PrefFilter implementation.
   virtual void FilterOnLoad(base::DictionaryValue* pref_store_contents)
       OVERRIDE;