Index: chrome/browser/prefs/pref_hash_tracker.h |
diff --git a/chrome/browser/prefs/pref_hash_tracker.h b/chrome/browser/prefs/pref_hash_tracker.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..dde9b9de46d83fa447f067da2b3c027daaca326a |
--- /dev/null |
+++ b/chrome/browser/prefs/pref_hash_tracker.h |
@@ -0,0 +1,25 @@ |
+// Copyright 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 CHROME_BROWSER_PREFS_PREF_HASH_TRACKER_H_ |
+#define CHROME_BROWSER_PREFS_PREF_HASH_TRACKER_H_ |
+ |
+#include <string> |
+ |
+namespace base { |
+class Value; |
+} // namespace base |
+ |
+// Updates stored preference value hashes in response to preference value |
+// changes. |
+class PrefHashTracker { |
+ public: |
+ virtual ~PrefHashTracker() {} |
+ |
+ // Receives notification of preference value changes. |
+ virtual void OnPrefValueChanged(const std::string& path, |
+ const base::Value* new_value) = 0; |
+}; |
+ |
+#endif // CHROME_BROWSER_PREFS_PREF_HASH_TRACKER_H_ |