rAc i18n: implement storage interface for libaddressinput

base/prefs/writeable_pref_store.h

Index: base/prefs/writeable_pref_store.h
diff --git a/base/prefs/writeable_pref_store.h b/base/prefs/writeable_pref_store.h
new file mode 100644
index 0000000000000000000000000000000000000000..f0e2135b9a394340db05366ca365650607214600
--- /dev/null
+++ b/base/prefs/writeable_pref_store.h
@@ -0,0 +1,37 @@
+// 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 BASE_PREFS_WRITEABLE_PREF_STORE_H_
+#define BASE_PREFS_WRITEABLE_PREF_STORE_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/prefs/pref_store.h"
+
+namespace base {
+class Value;
+}
+
+// A pref store that can be written to as well as read from.
+class BASE_PREFS_EXPORT WriteablePrefStore : public PrefStore {
+ public:
+  WriteablePrefStore() {}
+
+  // Sets a |value| for |key| in the store. Assumes ownership of |value|, which
+  // must be non-NULL.
+  virtual void SetValue(const std::string& key, base::Value* value) = 0;
+
+  // Removes the value for |key|.
+  virtual void RemoveValue(const std::string& key) = 0;
+
+ protected:
+  virtual ~WriteablePrefStore() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WriteablePrefStore);
+};
+
+#endif  // BASE_PREFS_WRITEABLE_PREF_STORE_H_