Remove outdated comment and forward declaration in pref_value_store.h

chrome/browser/prefs/pref_value_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_PREF_VALUE_STORE_H_
 #define CHROME_BROWSER_PREFS_PREF_VALUE_STORE_H_
 #pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "base/values.h"
 #include "chrome/browser/browser_thread.h"
 #include "chrome/common/pref_store.h"
 
 class FilePath;
 class PrefNotifier;
 class PrefStore;
-class Profile;
 
 // The PrefValueStore manages various sources of values for Preferences
 // (e.g., configuration policies, extensions, and user settings). It returns
 // the value of a Preference from the source with the highest priority, and
 // allows setting user-defined values for preferences that are not managed.
 //
 // Unless otherwise explicitly noted, all of the methods of this class must
 // be called on the UI thread.
 class PrefValueStore : public base::RefCountedThreadSafe<PrefValueStore> {
  public:
   // In decreasing order of precedence:
   //   |managed_platform_prefs| contains all managed platform (non-cloud policy)
   //        preference values.
   //   |device_management_prefs| contains all device management (cloud policy)
   //        preference values.
   //   |extension_prefs| contains preference values set by extensions.
   //   |command_line_prefs| contains preference values set by command-line
   //        switches.
   //   |user_prefs| contains all user-set preference values.
   //   |recommended_prefs| contains all recommended (policy) preference values.
   //   |default_prefs| contains application-default preference values. It must
   //        be non-null if any preferences are to be registered.
   //
   // |pref_notifier| facilitates broadcasting preference change notifications
   // to the world.
-  //
-  // The |profile| parameter is used to construct a replacement device
-  // management pref store. This is done after policy refresh when we swap out
-  // the policy pref stores for new ones, so the |profile| pointer needs to be
-  // kept around for then. It is safe to pass a NULL pointer for local state
-  // preferences.
   PrefValueStore(PrefStore* managed_platform_prefs,
                  PrefStore* device_management_prefs,
                  PrefStore* extension_prefs,
                  PrefStore* command_line_prefs,
                  PrefStore* user_prefs,
                  PrefStore* recommended_prefs,
                  PrefStore* default_prefs,
                  PrefNotifier* pref_notifier);
   virtual ~PrefValueStore();
 
@@ skipping 175 matching lines @@
   // corresponding PrefService.
   PrefNotifier* pref_notifier_;
 
   // A mapping of preference names to their registered types.
   PrefTypeMap pref_types_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefValueStore);
 };
 
 #endif  // CHROME_BROWSER_PREFS_PREF_VALUE_STORE_H_