[DevTools] Explicitly add Tethering domain to browser protocol.

content/browser/devtools/tethering_handler.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 CONTENT_BROWSER_DEVTOOLS_TETHERING_HANDLER_H_
 #define CONTENT_BROWSER_DEVTOOLS_TETHERING_HANDLER_H_
 
 #include <map>
 
 #include "content/browser/devtools/devtools_protocol.h"
 
 namespace content {
 
 class DevToolsHttpHandlerDelegate;
 
 // This class implements reversed tethering handler.
 class TetheringHandler : public DevToolsProtocol::Handler {
  public:
-  static const char kDomain[];
-
   TetheringHandler(DevToolsHttpHandlerDelegate* delegate);
   virtual ~TetheringHandler();
 
   void Accepted(int port, const std::string& name);
 
  private:
   class BoundSocket;
   scoped_refptr<DevToolsProtocol::Response> OnBind(
       scoped_refptr<DevToolsProtocol::Command> command);
   scoped_refptr<DevToolsProtocol::Response> OnUnbind(
       scoped_refptr<DevToolsProtocol::Command>  command);
 
   typedef std::map<int, BoundSocket*> BoundSockets;
   BoundSockets bound_sockets_;
   DevToolsHttpHandlerDelegate* delegate_;
   DISALLOW_COPY_AND_ASSIGN(TetheringHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_TETHERING_HANDLER_H_