DevTools: remote debugging should work in the IPv6-only environment.

chrome/browser/devtools/remote_debugging_server.h

 // Copyright (c) 2011 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_DEVTOOLS_REMOTE_DEBUGGING_SERVER_H_
 #define CHROME_BROWSER_DEVTOOLS_REMOTE_DEBUGGING_SERVER_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace devtools_http_handler {
 class DevToolsHttpHandler;
 }
 
 class RemoteDebuggingServer {
  public:
   static void EnableTetheringForDebug();
 
+  // Bind remote debugging service to the given |ip| and |port|.
+  // Empty |ip| stands for 127.0.0.1 or ::1.
   RemoteDebuggingServer(const std::string& ip, uint16_t port);
 
   virtual ~RemoteDebuggingServer();
 
  private:
   scoped_ptr<devtools_http_handler::DevToolsHttpHandler> devtools_http_handler_;
   DISALLOW_COPY_AND_ASSIGN(RemoteDebuggingServer);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_REMOTE_DEBUGGING_SERVER_H_