Added PrivetHTTPResolution::Start for service name only

chrome/browser/local_discovery/privet_http_asynchronous_factory.h

 // Copyright 2013 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_LOCAL_DISCOVERY_PRIVET_HTTP_ASYNCHRONOUS_FACTORY_H_
 #define CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_HTTP_ASYNCHRONOUS_FACTORY_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace net {
 class HostPortPair;
 class URLRequestContextGetter;
 }
 
 namespace local_discovery {
 
 class PrivetHTTPClient;
 
 class PrivetHTTPResolution {
  public:
   using ResultCallback = base::Callback<void(scoped_ptr<PrivetHTTPClient>)>;
 
   virtual ~PrivetHTTPResolution() {}
 
+  virtual void Start(const ResultCallback& callback) = 0;
+
   virtual void Start(const net::HostPortPair& address,
                      const ResultCallback& callback) = 0;
 
   virtual const std::string& GetName() = 0;
 };
 
 class PrivetHTTPAsynchronousFactory {
  public:
   using ResultCallback = PrivetHTTPResolution::ResultCallback;
 
   virtual ~PrivetHTTPAsynchronousFactory() {}
 
   static scoped_ptr<PrivetHTTPAsynchronousFactory> CreateInstance(
       net::URLRequestContextGetter* request_context);
 
   virtual scoped_ptr<PrivetHTTPResolution> CreatePrivetHTTP(
       const std::string& service_name) = 0;
 };
 
 }  // namespace local_discovery
 
 #endif  // CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_HTTP_ASYNCHRONOUS_FACTORY_H_