Renamed DefaultPrefStore into InMemoryPrefStore because it can be used in further contexts.

chrome/browser/prefs/in_memory_pref_store.h

 // 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_BROWSER_PREFS_DEFAULT_PREF_STORE_H_
-#define CHROME_BROWSER_PREFS_DEFAULT_PREF_STORE_H_
+#ifndef CHROME_BROWSER_PREFS_IN_MEMORY_PREF_STORE_H_
+#define CHROME_BROWSER_PREFS_IN_MEMORY_PREF_STORE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/scoped_ptr.h"
 #include "chrome/common/pref_store.h"
 
-// This PrefStore keeps track of default preference values set when a
-// preference is registered with the PrefService.
-class DefaultPrefStore : public PrefStore {
+// This PrefStore keeps track of preference values in memory and can be used,
+// e.g., for default preference values set when a preference is registered with

[Mattias Nissler (ping if slow), 2010/11/19 16:07:16]

I feel there are too many commas in this sentence, but I'm not a native speaker,
so I leave it to you to decide :)

[Pam (message me for reviews), 2010/11/21 18:01:14]

Looks OK to me. There's no hard rule for commas around "e.g.", except that 0 or
2 is better than 1 (unless you want to change the meaning of the sentence).

+// the PrefService.
+class InMemoryPrefStore : public PrefStore {
  public:
-  DefaultPrefStore();
-  virtual ~DefaultPrefStore();
+  InMemoryPrefStore();
+  virtual ~InMemoryPrefStore();
 
   // PrefStore methods:
   virtual DictionaryValue* prefs() const;
   virtual PrefStore::PrefReadError ReadPrefs();
 
  private:
   // The default preference values.
   scoped_ptr<DictionaryValue> prefs_;
 
-  DISALLOW_COPY_AND_ASSIGN(DefaultPrefStore);
+  DISALLOW_COPY_AND_ASSIGN(InMemoryPrefStore);
 };
 
-#endif  // CHROME_BROWSER_PREFS_DEFAULT_PREF_STORE_H_
+#endif  // CHROME_BROWSER_PREFS_IN_MEMORY_PREF_STORE_H_