Fix for Bug 50726 "Save extension list and "winning" prefs from extensions"

chrome/common/in_memory_pref_store.h

Index: chrome/common/in_memory_pref_store.h
diff --git a/chrome/common/in_memory_pref_store.h b/chrome/common/in_memory_pref_store.h
new file mode 100644
index 0000000000000000000000000000000000000000..fffdf5dbb083cb9298b05591303499c8e14e7f68
--- /dev/null
+++ b/chrome/common/in_memory_pref_store.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2010 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_COMMON_IN_MEMORY_PREF_STORE_H_
+#define CHROME_COMMON_IN_MEMORY_PREF_STORE_H_
+#pragma once
+
+#include <string>
+
+#include "base/scoped_ptr.h"
+#include "chrome/common/pref_store.h"
+
+class DictionaryValue;
+
+// This is a simple in-memory PrefStore that does not persist any data.
+class InMemoryPrefStore : public PrefStore {
+ public:
+  InMemoryPrefStore();
+
+  virtual ~InMemoryPrefStore();
+
+  // PrefStore methods:
+  virtual DictionaryValue* prefs() const { return prefs_.get(); }
+
+  virtual PrefReadError ReadPrefs() { return PREF_READ_ERROR_NONE; }
+
+ private:
+  scoped_ptr<DictionaryValue> prefs_;
+};
+
+#endif  // CHROME_COMMON_IN_MEMORY_PREF_STORE_H_
+