Make comments about profile pointer in pref_value_store more informative.

chrome/browser/policy/device_token_fetcher.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_POLICY_DEVICE_TOKEN_FETCHER_H_
 #define CHROME_BROWSER_POLICY_DEVICE_TOKEN_FETCHER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 13 matching lines @@
 // Fetches the device token that can be used for policy requests with the device
 // management server, either from disk if it already has been successfully
 // requested, otherwise from the device management server. An instance of the
 // fetcher is shared as a singleton by all users of the device management token
 // to ensure they all get the same token.
 class DeviceTokenFetcher
     : public NotificationObserver,
       public DeviceManagementBackend::DeviceRegisterResponseDelegate,
       public base::RefCountedThreadSafe<DeviceTokenFetcher> {
  public:
-  // Requests to the device management server are sent through |backend|, which
-  // is passed in explicitly to simplify mocking of the backend for unit
-  // testing. The fetcher uses the directory in |token_dir| in which to store
-  // the device token once it's retrieved from the server. Should only be called
-  // by unit tests.
+  // Requests to the device management server are sent through |backend|. It
+  // obtains the authentication token from |token_service|. The fetcher stores
+  // the device token to |token_path| once it's retrieved from the server.
   DeviceTokenFetcher(DeviceManagementBackend* backend,
                      TokenService* token_service,
                      const FilePath& token_path);
   virtual ~DeviceTokenFetcher() {}
 
   // NotificationObserver method overrides:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
@@ skipping 93 matching lines @@
   // or it has been determined that there was an error during fetching.
   base::WaitableEvent device_token_load_complete_event_;
 
   // Registers the fetcher for notification of successful Gaia logins.
   NotificationRegistrar registrar_;
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_DEVICE_TOKEN_FETCHER_H_