Adding virtual destructor to CloudPrintURLFetcherFactory

chrome/service/cloud_print/cloud_print_url_fetcher.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 CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_URL_FETCHER_H_
 #define CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_URL_FETCHER_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 12 matching lines @@
 class URLRequestStatus;
 }  // namespace net
 
 namespace cloud_print {
 
 // Factory for creating CloudPrintURLFetchers.
 class CloudPrintURLFetcher;
 class CloudPrintURLFetcherFactory {
  public:
   virtual CloudPrintURLFetcher* CreateCloudPrintURLFetcher() = 0;
+  virtual ~CloudPrintURLFetcherFactory();
 };
 
 // A wrapper around URLFetcher for CloudPrint. URLFetcher applies retry logic
 // only on HTTP response codes >= 500. In the cloud print case, we want to
 // retry on all network errors. In addition, we want to treat non-JSON responses
 // (for all CloudPrint APIs that expect JSON responses) as errors and they
 // must also be retried.
 class CloudPrintURLFetcher
     : public base::RefCountedThreadSafe<CloudPrintURLFetcher>,
       public net::URLFetcherDelegate {
@@ skipping 102 matching lines @@
   std::string additional_headers_;
   std::string post_data_mime_type_;
   std::string post_data_;
 };
 
 typedef CloudPrintURLFetcher::Delegate CloudPrintURLFetcherDelegate;
 
 }  // namespace cloud_print
 
 #endif  // CHROME_SERVICE_CLOUD_PRINT_CLOUD_PRINT_URL_FETCHER_H_