[net/dns] Removes locking from DnsConfigServiceWin and adds local computer name.

net/dns/file_path_watcher_wrapper.h

 // Copyright (c) 2012 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 NET_FILE_PATH_WATCHER_CALLBACK_H_
 #define NET_FILE_PATH_WATCHER_WRAPPER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 16 matching lines @@
 // Convenience wrapper which holds a FilePathWatcher and a
 // FilePathWatcher::Delegate which forwards its calls to a Callback.
 class NET_EXPORT FilePathWatcherWrapper
     : NON_EXPORTED_BASE(public base::NonThreadSafe) {
  public:
   FilePathWatcherWrapper();
   // When deleted, automatically cancels the FilePathWatcher.
   virtual ~FilePathWatcherWrapper();
 
   // Starts watching the file at |path|. Returns true if Watch succeeds.
-  // If so, the delegate will call callback.Run(true) from OnFilePathChanged and
-  // callback.Run(false) from OnFilePathError. After failure the watch is
-  // cancelled and will have to be restarted. If called again, the previous
-  // watch is cancelled.
+  // If so, |callback| will be called with true on change and false on error.
+  // After failure the watch is cancelled and will have to be restarted.
   bool Watch(const FilePath& path,
              const base::Callback<void(bool succeeded)>& callback);
 
   bool IsWatching() const;
 
   // Cancels the current watch.
   void Cancel();
 
  protected:
   // Creates a FilePathWatcher. Override to provide a different implementation.
   virtual scoped_ptr<base::files::FilePathWatcher> CreateFilePathWatcher();
 
  private:
   class WatcherDelegate;
 
   void OnFilePathChanged();
   void OnFilePathError();
 
   base::Callback<void(bool succeeded)> callback_;
   scoped_ptr<base::files::FilePathWatcher> watcher_;
   scoped_refptr<WatcherDelegate> delegate_;
   DISALLOW_COPY_AND_ASSIGN(FilePathWatcherWrapper);
 };
 
 }  // namespace net
 
 #endif  // NET_FILE_PATH_WATCHER_CALLBACK_H_