Index: base/prefs/pref_filter.h |
diff --git a/base/prefs/pref_filter.h b/base/prefs/pref_filter.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..3c7c8df38db6e5354ee5dc106a10fae804e23a8d |
--- /dev/null |
+++ b/base/prefs/pref_filter.h |
@@ -0,0 +1,35 @@ |
+// Copyright (c) 2013 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef BASE_PREFS_PREF_FILTER_H_ |
+#define BASE_PREFS_PREF_FILTER_H_ |
+ |
+#include <string> |
+ |
+#include "base/prefs/base_prefs_export.h" |
+ |
+namespace base { |
+class DictionaryValue; |
+class Value; |
+} // namespace base |
+ |
+// Filters preferences as they are loaded from disk or updated at runtime. |
+// Currently supported only by JsonPrefStore. |
+class BASE_PREFS_EXPORT PrefFilter { |
+ public: |
+ virtual ~PrefFilter() {} |
+ |
+ // Receives notification when the pref store data has been loaded but before |
+ // Observers are notified. |
+ // Changes made by a PrefFilter during FilterOnLoad do not result in |
+ // notifications to |PrefStore::Observer|s. |
+ virtual void FilterOnLoad(base::DictionaryValue* pref_store_contents) = 0; |
+ |
+ // Receives notification when a pref store value is changed, before Observers |
+ // are notified. |
+ virtual void FilterUpdate(const std::string& path, |
+ const base::Value* value) = 0; |
+}; |
+ |
+#endif // BASE_PREFS_PREF_FILTER_H_ |