Fixed OSX crash in net::URLFetcherCore::URLFetcherCore

chrome/browser/local_discovery/privet_url_fetcher.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_URL_FETCHER_H_
 #define CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_URL_FETCHER_H_
 
 #include <string>
 
 #include "base/files/file_util.h"
@@ skipping 100 matching lines @@
   bool OnURLFetchCompleteDoNotParseData(const net::URLFetcher* source);
 
   std::string GetHostString();  // Get string representing the host.
   std::string GetPrivetAccessToken();
   void Try();
   void ScheduleRetry(int timeout_seconds);
   bool PrivetErrorTransient(const std::string& error);
   void RequestTokenRefresh();
   void RefreshToken(const std::string& token);
 
-  GURL url_;
+  const GURL url_;
   net::URLFetcher::RequestType request_type_;
   scoped_refptr<net::URLRequestContextGetter> context_getter_;
   Delegate* delegate_;
 
   int max_retries_;
   bool do_not_retry_on_transient_error_;
   bool send_empty_privet_token_;
   bool has_byte_range_;
   bool make_response_file_;
   bool v3_mode_;
 
   int byte_range_start_;
   int byte_range_end_;
 
   int tries_;
   std::string upload_data_;
   std::string upload_content_type_;
   base::FilePath upload_file_path_;
   scoped_ptr<net::URLFetcher> url_fetcher_;
 
   base::WeakPtrFactory<PrivetURLFetcher> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(PrivetURLFetcher);
 };
 
 }  // namespace local_discovery
 
 #endif  // CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_URL_FETCHER_H_