Cleanup and style guideline conformance for policy implementation

chrome/browser/prefs/dummy_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_DUMMY_PREF_STORE_H_
 #define CHROME_BROWSER_PREFS_DUMMY_PREF_STORE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/scoped_ptr.h"
 #include "chrome/common/pref_store.h"
 
 class DictionaryValue;
 
 // |DummyPrefStore| is a stub implementation of the |PrefStore| interface.
 // It allows to get and set the state of the |PrefStore|.
 class DummyPrefStore : public PrefStore {
  public:
   DummyPrefStore();
-
   virtual ~DummyPrefStore() {}
 
-  virtual DictionaryValue* prefs() { return prefs_.get(); }
+  virtual DictionaryValue* prefs() const { return prefs_.get(); }
 
   virtual PrefStore::PrefReadError ReadPrefs();
 
   virtual bool ReadOnly() { return read_only_; }
 
   virtual bool WritePrefs();
 
   // Getter and Setter methods for setting and getting the state of the
   // |DummyPrefStore|.
   virtual void set_read_only(bool read_only) { read_only_ = read_only; }
   virtual void set_prefs(DictionaryValue* prefs) { prefs_.reset(prefs); }
   virtual void set_prefs_written(bool status) { prefs_written_ = status; }
   virtual bool get_prefs_written() { return prefs_written_; }
 
  private:
   scoped_ptr<DictionaryValue> prefs_;
 
   // Flag that indicates if the PrefStore is read-only
   bool read_only_;
 
   // Flag that indicates if the method WritePrefs was called.
   bool prefs_written_;
 
   DISALLOW_COPY_AND_ASSIGN(DummyPrefStore);
 };
 
 #endif  // CHROME_BROWSER_PREFS_DUMMY_PREF_STORE_H_